In a class of 80 students, every student had to study Economics or Geography or...

WAEC 1991

In a class of 80 students, every student had to study Economics or Geography or both Economics and Geography. lf 65 students studied Economics and 50 studied Geography, how many studied both subjects?

A. 15
B. 30
C. 35
D. 45
E. 50

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Correct Answer: Option C

Explanation

Applying the formula
80 = 65 - x + x + 50 - x
x = 35

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In a class of 80 students, every student had to study Economics or Geography or...

Correct Answer: Option C

Explanation

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