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Ankwendu Primary School has r pupils and Matheka Primary School has s pupils. A third school, Kapsoti Primary School has 150 pupils less than the total number of pupils in Ankwendu and Matheka Primary Schools.

Class: KCPE

Subject: Mathematics

Topic: Algebra

Lesson Summary

Ankwendu Primary School has r pupils and Matheka Primary School has s pupils. A third school, Kapsoti Primary School has 150 pupils less than the total number of pupils in Ankwendu and Matheka Primary Schools. Which one of the following expressions gives the total number of pupils in the three schools?

A. 2r+2s-150
B. r+s-150
C. 2r+2s+150
D. r+s+300



Text Answer


Ankwendu and Matheka have (r+s) pupils.

Kapsoti primary school has (r+s-150) pupils

Total number of pupils = (r+s) + (r+s-150) = r+s+r+s-150= 2r + 2s – 150

The correct answer is A (2r + 2s – 150).

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