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Every evening before the end of preps, Eunice either reads a novel or solves a mathematical problem. The probability
that she reads a novel is 4/5.If...
(Solved)
Every evening before the end of preps, Eunice either reads a novel or solves a mathematical problem. The probability
that she reads a novel is 4/5.If she read a novel, there is a probability of 3/4 that she will fall asleep. If he solves a mathematical problem, there is a probability of 1/4 that she will fall asleep. Sometimes the teacher on duty enters Eunice’s classroom. When Eunice is asked whether she had been asleep, there is a probability of only 1/5 that she will
admit that she had been asleep and a probability of 3/5 that she will claim to have been asleep when she had not been asleep
By use of a tree diagram, find the probability that
a) She sleeps and admits
b) She sleeps and does not admit
c). She does not sleep but claims that she had been asleep
d). She does not sleep and says that she has not been asleep
Date posted:
April 30, 2019
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Answers (1)
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A man sold a plot of land for sh. 160,000 and invested the money in a bank which pays 12% p.a. compounded semiannually.
After 2 years,...
(Solved)
A man sold a plot of land for sh. 160,000 and invested the money in a bank which pays 12% p.a. compounded semiannually.
After 2 years, he withdrew sh. 100,000 and the left the rest for a further 3 years.
a) How much did she leave in the bank at the end of 2 years?
b) How much did he have in the bank at the end of 5 years?
c) Calculate the total interest made for the whole period.
Date posted:
April 30, 2019
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Answers (1)
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The first three terms of a geometric series are 2x,x- 8 and 2x+ 5 respectively.
(Solved)
The first three terms of a geometric series are 2x,x− 8 and 2x+ 5 respectively.
a) Find the possible values of x.
b) For the value of x being an integer, find:
i) The value of the eleventh term
ii) The sum of the first 15 terms
Date posted:
April 30, 2019
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Answers (1)
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Two tanks of equal volume are connected in such a way that one tank can be filled by pipe A in 1 hour 20 minutes....
(Solved)
Two tanks of equal volume are connected in such a way that one tank can be filled by pipe A in 1 hour 20 minutes. Pipe
B can drain one tank in 3hours 36 minutes but pipe C alone can drain both tanks in 9 hours. Calculate:
(a) The fraction of one tank that can be filled by pipe A in one hour.
(b) The fraction of one tank that can be drained by both pipes B and C in one hour.
(c) Pipe A closes automatically once both tanks are filled. Assuming that initially both tanks are empty and all pipes
opened at once, calculate how long it takes before pipe A closes.
Date posted:
April 30, 2019
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Answers (1)
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An object of an area 4cm2 is mapped onto an area 64cm2 under the transformation of matrix below. Find the possible values of n.
(Solved)
An object of an area 4cm2 is mapped onto an area 64cm2 under the transformation of matrix below. Find the possible values of n.
Date posted:
April 30, 2019
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Answers (1)
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If r = 3i – j + k and t = j + 2k. P = r -2t find |P| to 4 s.f.
(Solved)
If r = 3i – j + k and t = j + 2k. P = r -2t find |P| to 4 s.f.
Date posted:
April 30, 2019
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Answers (1)
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Give that x2 + 6x +y2 – 8y - 11= 0 is the equation of a circle, find the centre and the radius of the...
(Solved)
Give that x2 + 6x +y2 – 8y - 11= 0 is the equation of a circle, find the centre and the radius of the circle.
Date posted:
April 30, 2019
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Answers (1)
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Find the equation of the normal of the curve. y = x5 + 3x2 + 5x at the point (1,3)
(Solved)
Find the equation of the normal of the curve. y = x5 + 3x2 + 5x at the point (1,3)
Date posted:
April 30, 2019
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Answers (1)
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Without using a calculator or mathematical tables, express;
(Solved)
Without using a calculator or mathematical tables, express;
in surd form and simplify Leaving your answer in the form a+ b √c where a, b, and c are rational numbers.
Date posted:
April 30, 2019
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Answers (1)
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a) Expand and simplify the binominal expression ( 2+ 2y)5 in ascending powers of y
(Solved)
a) Expand and simplify the binominal expression ( 2+ 2y)5 in ascending powers of y
b) Use the expansion up to the fourth term to evaluate (2.02)5 correct to 4 decimal places.
Date posted:
April 30, 2019
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Answers (1)
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A shear parallel to the x-axis maps point (1,2) onto a point (5, 2) .Determine the shear factors and hence state the shear matrix (invariant...
(Solved)
A shear parallel to the x-axis maps point (1,2) onto a point (5, 2) .Determine the shear factors and hence state the shear matrix (invariant line is y = 0)
Date posted:
April 30, 2019
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Answers (1)
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Two grades of Kenyan coffee costing sh. 200 and sh. 250 per kg respectively are mixed in the ratio 3:5 by weight. The
mixture is then...
(Solved)
Two grades of Kenyan coffee costing sh. 200 and sh. 250 per kg respectively are mixed in the ratio 3:5 by weight. The mixture is then sold at ksh. 240 per kg. Find the percentage profit on the cost.
Date posted:
April 30, 2019
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Answers (1)
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In the diagram below, X is the point of intersection of the chords AC and BD of the circle such that AX = 8cm, XC...
(Solved)
In the diagram below, X is the point of intersection of the chords AC and BD of the circle such that AX = 8cm, XC = 4cm
and XD = 6cm.
(a) Find the length of XB.
(b) Given that the area of triangle AXD = 6cm2. Find the area of triangle BXC.
Date posted:
April 30, 2019
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Answers (1)
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Without using tables or calculator, solve for x.
(Solved)
Without using tables or calculator, solve for x.
Date posted:
April 30, 2019
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Answers (1)
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Find the range of value of
(Solved)
Find the range of value of
Date posted:
April 30, 2019
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Answers (1)
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Use logarithms in all steps to evaluate:
(Solved)
Use logarithms in all steps to evaluate:
Date posted:
April 30, 2019
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Answers (1)
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Matrix T is given by;
(Solved)
Matrix T is given by;
a) Find T-1
b) Aquinas High School purchased 8 bags of rice and 14 bags of sugar for sh. 106,000.Buru Buru Girls High school
purchased 10 bags of rice and 10 bags of sugar for sh. 95,000. Each bag of rice cost Sh.R and a bag of sugar coat
sh. S.
i) Form matrix equation to represent the information above
ii) Use the matrix T-1 to find the prices of one bag of each item.
c) The price of beans later went up by 5% and that of sugar remained constant. Buru Buru Girls bought the same
quantity of rice but spent total amount of sh. 87,250 on the two items. State the new ratio of rice to sugar.
Date posted:
April 30, 2019
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Answers (1)
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The diagram below shows a histogram representing marks obtained in maths test by form one of St. Teresa Boys
Secondary school
(Solved)
The diagram below shows a histogram representing marks obtained in maths test by form one of St. Teresa Boys
Secondary school
a) Develop a frequency distribution table for the data
b) State the modal frequency.
c) Estimate the mean using and assumed mean of 33
Date posted:
April 30, 2019
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Answers (1)
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Kamdara and Jet are two towns 320 kilometres apart. A bus left A at 8.00 am travelling at 60km/h for town B. After
forty minutes, a...
(Solved)
Kamdara and Jet are two towns 320 kilometres apart. A bus left A at 8.00 am travelling at 60km/h for town B. After
forty minutes, a saloon car left A travelling in the same direction as the bus at a speed of 80km/h.
a) How far from B did the saloon car catch up with the bus?
b) At what time did it catch up with the bus?
c) When the saloon caught up with the bus it got a break – down and had to be repaired before proceeding to B at the
same speed. If they both reached at B at the same time, find how long it took to repair the saloon?
Date posted:
April 30, 2019
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Answers (1)
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The height of a wooden solid cone is 45cm and its curved surface area is four times the area of the base. Calculate:
(Solved)
The height of a wooden solid cone is 45cm and its curved surface area is four times the area of the base. Calculate:
a) The radius of of the base
b) The total surface area of the cone.
c) The volume of the cone
Date posted:
April 30, 2019
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Answers (1)