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Question

For which pair of courses is the number of boys the same?

A
E, F
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B
A, D
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C
C, F
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D
B, D
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E
None of these
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Solution

The correct option is C C, FNumber of boys in course E = 12% of 1200 - 14% of 800 = 144 - 112 = 32 In course F = 13% of 1200 - 14% of 800 = 156 - 12 = 44 In course A = 20% of 1200 - 30% of 800 =240−240=0 In course D = 35% of 1200 - 30% of 800 = 420 - 240 = 180 In course C = 5 % of 1200 - 2% of 800 = 60 - 16 = 44 Obviously pair C and F is our answer.

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