Question

the sum of 10 observation is 85, then their mean is ​

Answer 1

Answer:

mean=8.5

Step-by-step explanation:

sum of 10 observations=85

mean=85/1

=8.5

Answer 2

Given that mean (if it is arithmetic mean) of 10 observations is 8.5

If each observation is multiplied by 2, the new mean of the observations will be twice the original mean value

So new mean will be

2*8.5 = 17