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प्रश्न
72% of students in a class took Physics and 44% took Mathematics. If each student took Physics or Mathematics and 40 took both, the total number of students in the class would be
पर्याय
200
240
250
320
MCQ
उत्तर
250
Explanation:
No. of Student took Physics n(N) = 72%
No. of Student took Mathematics n(M) = 44%
n (M`∪`N) = 100%
n (M`∩`N) = 72 + 44 − 100 = 116 − 100 = 16%
ATQ
`16/100"x"=40`
x = 250
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Percentage, Discount and Partnership (Entrance Exam)
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