Question

If the mean of 8 , 14 , 20 , x and 12 is 13, find x.

Answer 1

Numbers are = 8, 14, 20, x, 12 

Mean= 13 
n = 5

`barx = (x_1 + x_2 + x_3 + .... + x_n)/n`

⇒ `13 = (8+ 14+20+x + 12 )/5`

⇒ `13 = (54+x )/5`

⇒ 54+X=65 

⇒ x = 11

The value of x = 11