There were 217 children enrolled in the Penelope Gym School in 2019.
37 of the children were boys. Additional children joined the gym school in 2020. For every 3 boys who joined the gym school, 2 girls joined the gym school. If there was an equal number of girls and boys in 2020, how many girls joined the school in that year?
|
Boys |
Girls |
Before |
93 |
124 |
Change |
+ 3 u |
+ 2 u |
After |
93 + 3 u |
124 + 2 u |
Fraction of children who are girls
= 1 -
37 =
47 Number of boys at first
=
37 x 217
= 93
Number of girls at first
=
47 x 217
= 124
Boys who joined : Girls who joined
3 : 2
The number of girls and boys in the end is the same.
93 + 3 u = 124 + 2 u
3 u - 2 u = 124 - 93
1 u = 31
Number of girls who joined the school in that year
= 2 u
= 2 x 31
= 62
Answer(s): 62