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

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Solution

The correct option is B
14

Given:

$\sum f x = 5 x + 2$

$\sum f = 12$

Mean = 6

We know that,

$M e a n = \frac{\sum f x}{\sum f}$

$6 = \frac{5 x + 2}{12}$

$12 \times 6 = 5 x + 2$

$72 = 5 x + 2$

$5 x = 70$

$x = 14$

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