Average



Question (27/66)

The average of 8 numbers is 20. The average of first two numbers is `15 1/2`  and that of the ne
xt three numbers is `21 1/3` . If the sixth number be less than the seventh and eight numbers by 4 and 7 respectively, then the eighth number is ?

(A)  18

(B)  22

(C)  25

(D)  27

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Question (28/66)

Of the three numbers, the average of first and second is greater than the average of second and third number by 15. What is the difference between the first and the third number ?

(A)  15

(B)  30

(C)  45

(D)  60

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