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Question

If fx=5x+2 and f=12 and the mean of the distribution is 6, then the value of x is less than _____.

A
12
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B
14
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C
16
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D
18
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Solution

The correct option is D 16
We know
Mean=fxf
6=5x+212
5x+2=12×6
5x=722=70
x=14

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