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If the scores of 3 students in a test are 5, 6 and 7, find t...

If the scores of 3 students in a test are 5, 6 and 7, find the standard deviation of their scores

A.

23

B.

233

C.

23

D.

32

Correct answer is C

(x) = 5+6+73

= 183

= 6

scores(X)d = (x - x) deviation(deviation)25561666077612

S.D d2n where d = deviation = (x - x)

= 23