Question

Arithmetic mean of 20 values is 32 and arithmetic mean of 10 more values is 308 find sum of mean of total 30 values

Answer 1

Answer:

Mean of total 30 values = 124 .

Step-by-step explanation:

We are given that arithmetic mean of 20 values is 32 and arithmetic mean of 10 more values is 308.

Mean formula is given by = $\frac{\sum X}{n}$

Firstly, arithmetic mean of 20 values is 32 ;

So, total sum of values of these 20 values = 32 * 20 = 640

Secondly, arithmetic mean of 10 more values is 308 ;

 So, total sum of values of these 10 values = 308 * 10 = 3080

Total sum of values of 30 values = 640 + 3080 = 3720

Therefore, Mean of 30 values = $\frac{3720}{30}$ = 124 .