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

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Solution

The correct options are
C
15

D
18

$\sum$ fx = $\sum$ f $\times$ mean
5x + 2 = 12 $\times$ 6
5x = 72 – 2 = 70
x = 14

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