Question

find x, if 9, x, 14, 18, x, x, 8, 10, 4 have a mean of 11​

Answer 1

Step-by-step explanation:

sum of all obs. = 63+ 3x

total no. pf obs. = 9

Now,, Mean = sum of obs. / total obs.

$11 = \frac{63 + 3x}{9} \\ 99 - 63 = 3 \\ = 36 = 3x \\ = x = 12$