Mathematics
If 69.5 is the mean of 72, 70, x, 62, 50, 71, 90, 64, 58 and 82 : find the value of x.
Measures of Central Tendency
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Answer
Sum of observations : 72 + 70 + x + 62 + 50 + 71 + 90 + 64 + 58 + 82 = 619 + x.
By formula,
Mean =
⇒ 69.5 =
⇒ 695 = x + 619
⇒ x = 695 - 619
⇒ x = 76.
Hence, x = 76.
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