A cupboard has 7 white cups and 5 brown cups all identical in size and shape.

A cupboard has 7 white cups and 5 brown cups all identical in size and shape. There is a blackout in the town and Mrs. Wafula has to select three cups one after the other without replacing the previous ones.

a) Draw a tree diagram for the information.

b) Calculate the probability that she chooses.
i) Two white cups and one brown cup
ii) Two brown cups and one white cup.
iii) At least one white cup.
iv) Three cups of the same colour

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Wilfykil answered the question on September 12, 2019 at 08:50

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