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If sumf(i)=20, sumf(i)x(i)=120+y and bar...

If `sumf_(i)=20`, `sumf_(i)x_(i)=120+y` and `barX=7`, then `y=?`

A

`10`

B

`20`

C

`30`

D

`40`

Text Solution

Verified by Experts

The correct Answer is:
B
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