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WAEC Mathematics 2018 Paper

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Question : 6

Total: 50

There are 250 boys and 150 girls in a school, if 60% of the boys and 40% of the girls play football, what percentage of the school play football?

40.0%
42.2%
50.0%
52.5%

Solution:

Population of school = 250 + 150 = 400

60% of 250 = $\frac{\text{60\%}}{\text{100\%}}$ x 250 = 150

40% of 150 = $\frac{\text{40\%}}{\text{100\%}}$ x 150 = 60

Total number of students who plays football;

150 + 60 = 210

Percentage of school that play football;

$\;\frac{210}{400}$ x 100% = 52.5%

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