Question

the mean of 25 35 18 x 23 17 and 39 is 161 find the value of x​

Answer 1

Given :

Mean of , 25, 35 , 18 , x , 23 , 17 , 39 is 161

To find :

Value of x

Formula used :

Mean = sum of observation ÷ number of observation

Solution :

➠ Mean = ( 25 + 35 + 18 + x + 23 + 17 + 39) ÷ 7

➠ 161 = (157+ x) ÷ 7

➠ 161 × 7 = 157 + x

➠ 1127 = 157 + x

➠ x = 1127 - 157

➠ x = 970

ANSWER :

x = 970