Question

If the mean of 9, 8, x, 36, 12 is 15, find the value of x.​

Answer 1

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Answer 2

Given :

. If the mean of 9, 8, 10, x, 12 is 15, find the value of x.

Solution :

Mean of the given numbers = (9 + 8 + 10 + x + 12)/5 = (39 + x)/5

According to the problem, mean = 15 (given).

Therefore, (39 + x)/5 = 15

⇒ 39 + x = 15 × 5

⇒ 39 + x = 75

⇒ 39 - 39 + x = 75 - 39

⇒ x = 36

Hence, x = 36.