यदि a =10, sumfi di =150 तथा sumfi =15 ...

यदि a =10, ` sumf_i d_i =150` तथा` sumf_i =15` तब माध्य होगा -

A

`10`

B

`20`

C

`30`

D

`5`

लिखित उत्तर

Verified by Experts

The correct Answer is:

B

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