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