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A form IV maths teacher originally worked out the mean mark of her 30 students to be 41. After the correction of the test, she...

A form IV maths teacher originally worked out the mean mark of her 30 students to be 41. After the correction of the test, she added some marks of the test, she added some marks to Njoki,Chelimo and Nafula in the ratio 2:3:4,if the new mean mark for the class is 42.5 determine how many more marks Nafula was added than Chelimo.

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sharon kalunda answered the question on August 14, 2019 at 11:50

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