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Answer:
girls = 16
boys = 20
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In the beginning let the
no. of Girls be g, Boys be b
b:g= 4:5
b= 4x
g= 5x
now no. of Girls be g1, Boys be b1
g1 = g-4 = 5x-4
b1 = b+8 = 4x+8
g1:b1 = 1:1
g1 = b1
5x-4 =4x+8
x= 12
g = 5x = 5×12 =60
b =4x = 4×12 =48
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