Nineteen minutes ago, 60% of the children in a basketball court were girls. 22 more children entered the basketball court. As a result, the number of girls increased by 20% and the number of boys increased by 60%. How many children are in the basketball court now?
| |
Girls |
Boys |
Total |
| Before |
5 u |
2 u |
7 u |
| Change |
+ 1 u |
+ 1.2 u |
+ 2.2 u |
| After |
6 u |
3.2 u |
9.2 u |
60% =
60100 =
35Number of more girls who entered the basketball court
= 20% x 5 u
=
20100 x 5 u
= 1 u
Number of more boys who entered the basketball court
= 60% x 2 u
=
60100 x 2 u
= 1.2 u
Total number of more children who entered the basketball court
= 1 u + 1.2 u
= 2.2 u
2.2 u = 22
1 u = 22 ÷ 2.2 = 10
Number of children in the basketball court now
= 6 u + 3.2 u
= 9.2 u
= 9.2 x 10
= 92
Answer(s): 92
