200 people went to a bird park.
34 were adults. Some children joined halfway and the ratio of the number of adults to the number of children became 6 : 5. How many children joined the bird park halfway?
| |
Adults |
Children |
Total |
| Before |
3x2 =
6 u |
1x2 =
2 u |
4x2 =
8 u |
| Change |
|
+ ? |
|
| After |
6 u |
5 u |
|
Fraction of the people that were children at first
= 1 -
34 =
14 Number of adults remains unchanged. Make the number of adults the same. LCM of 3 and 6 is 6.
Total number of people at first = 8 u
8 u = 200
1 u = 200 ÷ 8 = 25
Number of children who joined halfway
= 5 u - 2 u
= 3 u
= 3 x 25
= 75
Answer(s): 75
