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The average of a set of 30 numbers is 25. If three numbers 13, 15 and 20 are discarded, then the average of the remaining numbers is

A12

B18

C24

D26

Answer:

D. 26

Read Explanation:

The average of a set of 30 numbers is 25 Sum of 30 numbers = 30 × 25 =750 If three numbers 13, 15 and 20 are discarded The sum becomes = 750 - (13 + 15 + 20) = 750 - 48 = 702 new average = 702/27 = 26


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