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Answer

Adults : Children
3(x5) : 4(x5)
15 : 20
Boys = 1/5
A : B : G
15 : 4 : 16 = 35

A) Girls = 16/35

3U x 3 + 4U x 4 = 500
25U= 500
1U = 500/25 = 20
3U = 60
B) 60

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