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Question

fx = 5x + 2, f = 12. If the mean of the distribution is 6, what is the value of x?


A

12

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B

14

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C

15

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D

18

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Solution

The correct option is B

14


We know Mean = fxf

Hence, 5x+212 = 6

5x + 2 = 12 × 6
5x = 72 – 2 = 70
x = 14


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