Question

$\sum f_i{x}_i=6Y-4$ and $\sum f_i=8$. If the mean of the distribution is 7, what is the value of Y?

• A. 9
• B. 10
• C. 11
• D. 12

Answer 1

The correct option is B 10

$\because Mean=\frac{\Sigma f_i{x}_i}{\Sigma f_i}$

$\Rightarrow 7=\frac{6Y-4}{8}$

$\Rightarrow$6Y – 4 = 7 x 8 = 56
$\Rightarrow$6Y = 56 + 4 = 60
$\Rightarrow$Y = 10