A student was asked to find the arithmetic mean of the number 3,11,7,9,15,13,8,19,17,21,14 and x. He found the mean to be 12. What should be the number in place of x?
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Answered by
21
Answer: 7
Explanation:
Explanation:
As, Mean = Total Sum of Observations / No. of Observations
Clearly, we have (3 + 11 + 7 + 9 + 15 + 13 + 8 + 19 + 17 + 21 + 14 + x) / 12 = 12.
or 137 + x = 144
⇒ x = 144 - 137
= 7.
Hope This Helps :)
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9
Hlo
Here’s your answer
Brain liest plz
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