1.

A student was asked to find the arithmetic mean of the following 12 numbers : 3, 11, 7, 9, 15, 13, 8, 19, 17, 21, 14 and y He found the mean to be 12. The value of y will be :

A. 3
B. 7
C. 17
D. 31
Answer» C. 17


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