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5, 8, 6 and k occur with frequency 3, 2, 4, and 1 respectively an d have a mean ...


Question

5, 8, 6 and k occur with frequency 3, 2, 4, and 1 respectively an d have a mean of 5.7. Find the value of k

Options

A) 4

B) 3

C) 2

D) 1

The correct answer is C.

Explanation:

xffx
5315
8216
6424
kik
f=10fx=55+k
Mean =fx
fx
5.7 =55+k
10

57 = 55 + k
k = 57 - 55
k = 2

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