The average of the marks of maths test of 20 student is 9. If the marks of 5 new students are 9,5,

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06 Dec 2010 average marks?

The average of the marks of maths test of 20 student is 9. If the marks of 5 new students are
9,5,3,2,1 the the new average marks is

OPtion

1) 11
2) 10
3) 9.5
4) 9
5) 8
6) 8.5
7) 7
8) 7.5
9) 5
10) 6

Solution

(20*9)+5+4+3+2+1/25 = 8

Correct Option: 5 Best Solution (8)