A total of 390 adults and children went to a bird park. There were 30 more children than adults at the bird park. Given that the number of girls was 4 times the number of boys at the bird park, how many girls were at the bird park?
Adults |
Children |
Total |
5 u - 30 |
5 u |
390 |
|
Girls |
Boys |
|
|
4 u |
1 u |
|
Number of boys = 1 u
Number of girls = 4 u
Number of children = 1 u + 4 u = 5 u
Number of adults = 5 u - 30
Total number of people
= 5 u + 5 u - 30
= 10 u - 30
10 u - 30 = 390
10 u = 390 + 30
10 u = 420
1 u = 420 ÷ 10 = 42
Number of girls
= 4 u
= 4 x 42
= 168
Answer(s): 168