# 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.)

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

**
**