Question

The mean of 10 , 12 ,18 ,13 , x ,17 is 15 find the value of x

Answer 1

Observations are 10 , 12 , 18 , 13 , x , 17

Mean = 15 ( given ) ------( 1 )

Mean = ( 10 + 12 + 18 + 13 + x + 17 ) / 6

= ( 70 + x )/6-------( 2 )

( 2 ) = ( 1 )

(70 + x ) / 6 = 15

70 + x = 15 × 6

70 + x = 90

x = 90 - 70

x = 20

Therefore ,

Value of x = 20

I hope this helps you.