At first, there were 388 more girls than boys at the theme park. By 2 p.m., a total of 230 girls and boys left the theme park. There were as many girls as boys who left the theme park. In the end, there were 5 times as many girls as boys who remained behind. How many girls were at the theme park at first?
|
Girls |
Boys |
Difference |
Before |
5 u + 115 |
1 u + 115 |
388 |
Change |
- 115 |
- 115 |
|
After |
5 u |
1 u |
4 u |
Since there was the same number of boys and girls that left, the difference between the number of boys and girls remains unchanged.
4 u = 388
1 u = 388 ÷ 4 = 97
Number of girls in the end
= 5 u
= 5 x 97
= 485
Number of girls that left
= 230 ÷ 2
= 115
Number of girls at first
= 485 + 115
= 600
Answer(s): 600