$\sum g_{x}$ = 8y + 18, $\sum g$ = 10. If the mean of the distribution is $5$ , what is the value of $y$ ?

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Solution

The correct option is C
15

Mean = $\frac{\sum g x}{\sum g}$

$8 y + 18$ = $5 \times 10$
$8 y$ = $50 - 18$ = $32$
$y = 4$

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