Question

A student needs to find the average of the numbers 14, 18, 7, 6, 16,9,6, 1, 15.
13.8 od k. He found the average to be 12. What is the value of a​

Answer 1

The question provided above is incorrect. The correct question is given below:-

"A student needs to find the average of the numbers 14, 18, 7, 6, 16, 9,6,1,15,13,8, a. He found the average to be 12. What is the value of a?"

Given:-

Number of observations = 12

Numbers = 14,18,7,6,16,9,6,1,15,13,8, a

Average = 12

To find:-

The value of a

Solution:-

The formula to find the average = $\frac{sum of observations}{number of observation}$

12 = $\frac{113 + a}{12}$

144 = 113 + a

a = 144 - 113

a = 31

Hence, the value of a is 31.

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