the sum of the marks obtained by 20 girls of a class in a test is the same as the sum of the mark obtained by 25 boys. The average mark obtained by the girls is that __________ obtained by the boys. A.more than. B.less than. C.equal to. D.(We cannot say any of the above without knowing their individual marks.)
Let avg mark girls get be x and boys get y
Since sum obtained by 20 girls is equal to that obtained by 25 boys
20x = 25y
x= (25/20)y = (5/4)y
Thus x> y
Thus average marks girls obtain is MORE than that obtained by boys
Since sum obtained by 20 girls is equal to that obtained by 25 boys
20x = 25y
x= (25/20)y = (5/4)y
Thus x> y
Thus average marks girls obtain is MORE than that obtained by boys