The mean weight of 9 items is 15. If one more item is added to the series, the mean 16. The value of 10th item is


A) 35

B) 30

C) 25

D) 20

Correct Answer:
C) 25

Description for Correct answer:

Total weight of 9 items = 15 x 9 = 135

and total weigth of 10 items = 16 X 10 = 160

Therefore, weight of 10 items = 160 - 135 = 25


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