Let x1,x2,......xn, bem n observations s...

Let `x_1,x_2,......x_n,` bem n observations such that `sum x_i^2=400 and sum x_i=80.` Then a possible value of `n` amongthe following is (1) `12` (2) `9` (3) `18` (4) `15`

A

15

B

18

C

9

D

12

Text Solution

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The correct Answer is:

B

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