In a class of 72 pupils the number of girls is four-fifth's of the number of boys. Find the number of girls in the class.
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Answer:
total no. Of students= 72
No. Of boys= x
No. Of girls= x(4/5) nothing but, 4x/5
So, total no. Of students= x+(4x/5) = 72
(5x/5)+(4x/5) = 9x/5
So 9x/5= 72
72×5 =9x
360= 9x
9x=360
x= 360/9
x=40
No. Of boys= 40
No. Of girls= 32
Hope it helps
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