Answers

2016-01-28T14:00:06+05:30
Let no. of guys = x
and no of girls = y
equations formed:
x + y = 22 ----1
2y + 31 = 3x----2

on solving simultaneously,
x = 15, y = 7
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2016-01-28T14:50:37+05:30
No of girls at the party=G
no of boys at the party=B
no of glasses the girls drank=2G
no of glasses the boys drank=3B
3B-2G=31-----------(1)    ======>3B-2G=31
G+B=22-------------(2)  *2======>2B+2G=44
_______________                        _________
=========================>5B=75=====>B=15
in equation 2
G+15=22
G=7
.'. no of boys=15
no of girls=7
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