Ten minutes ago, 60% of the children in a canteen were boys. 50 more children entered the canteen. As a result, the number of boys increased by 20% and the number of girls increased by 75%. How many children are in the canteen now?
| |
Boys |
Girls |
Total |
| Before |
5 u |
2 u |
7 u |
| Change |
+ 1 u |
+ 1.5 u |
+ 2.5 u |
| After |
6 u |
3.5 u |
9.5 u |
60% =
60100 =
35Number of more boys who entered the canteen
= 20% x 5 u
=
20100 x 5 u
= 1 u
Number of more girls who entered the canteen
= 75% x 2 u
=
75100 x 2 u
= 1.5 u
Total number of more children who entered the canteen
= 1 u + 1.5 u
= 2.5 u
2.5 u = 50
1 u = 50 ÷ 2.5 = 20
Number of children in the canteen now
= 6 u + 3.5 u
= 9.5 u
= 9.5 x 20
= 190
Answer(s): 190
