Mathematic question?

There were 210 children at the swimming pool complex, 1/5 of the boys and 3/8 of the girls were swimming. If there were 63 pupils swimming in the pool

There were 210 children at the swimming pool complex, 1/5 of the boys and 3/8 of the girls were swimming. If there were 63 pupils swimming in the pool, how many girls were there swimming in the pool?

or:There were 210 children at the swimming pool complex, 1/5 of the boys and 3/8 of the girls were swimming. If there were 63 pupils swimming in the pool, how many girls were there swimming in the pool?

or:1/5B + 3/8G = 63B+G =2108B + 15G =25208B + 8G = 16807G = 840g=120Number of girls swimming = 360/8 = 45

or:210 people. 1/5 were boys(42).. that leaves 168 girls 3/8 of the 168 girls were swimming so thats 63. The fact of 63 pupils... well all girls.. ;)

or:Take Girls g, Boys bNow Girls= 3*g/8 Boys= 1*b/5Total b+g= 210 => b=210-gPut value of b in below equation:=> 63= (3*g/8) +(b/5)=> 63 = (3*g/8) + (210-g/5)=> g=120Girls= 3*g/8= 3*120/8= 360/8 = 45 So 45 girls were swimming there.

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