Question

if the mean of N observation is 12 and the sum of the observations is 132 then find the value of N<br />​.​

Answer 1

If the mean of N observation is 12 and the sum of the observations is 132 then find the value of N is 11 .

The sum of all observations = 132 .

We know that , mean = $\frac{Sum of all observations}{Total number of observations}$ = $\frac{132}{n}$ .

But, mean = 12 .

⇒ n = $\frac{132}{12}$ = 11 .

The number of observations ' n ' = 11 .

Therefore , the value of N is 11 .

Answer 2

Step-by-step explanation:

11

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