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Maths Puzzle
Numerical Ability
Ratio and Proportion
A sum of Rs.312 was divided among 100 boys and girls in such a way that the boy gets Rs.3.60 and each girl Rs.2.40 the number of girls is
Read Solution (Total 2)
-
- 60boys
40 girls
60*3.60+40*2.40=312 - 10 years agoHelpfull: Yes(1) No(2)
- Explanation:
Step (i): Let x be the number of boys and y be the number of girls.
Given total number of boys and girls = 100
x+y=100 -------------- (i)
Step (ii): A boy gets Rs. 3.60 and a girl gets Rs. 2.40
The amount given to 100 boys and girls = Rs. 312
3.60x + 2.40y = 312 -------------- (ii)
Step (iii):
Solving (i) and (ii)
3.60x + 3.60y = 360 --------- Multiply (i) by 3.60
3.60x + 2.40y = 312 --------- (ii)
1.20y = 48
y = 48 / 1.20
= 40
Number of girls = 40 - 8 years agoHelpfull: Yes(0) No(0)
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