There are 50 students in a class 30 rupees are distributed among them so that each boy gets 100 P an...........

Quantitative Aptitude (CDS) Mixture and Alligation

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There are 50 students in a class. 30 rupees are distributed among them so that each boy gets 100 P and each girl gets

50 P. Find the number of boys and girls in that class?

40, 10

40, 25

39, 26

29, 36

Explanation:

Here, the allegation is applicable for ‘money per boy or girl”.
Mean value of money per student = 3000/50
= 60 P
Therefore , boys : girls = 100 – 60 / 60 – 50
= 40/10 = 4/1
Thus , number of boys = 50×4 / 4+1 = 50×4/5
= 40
Number of girls = 50 – 40 = 10