Question

The mean of a set of 10 numbers is M. By combining with it a second set of M
numbers, the mean of the combined set becomes 10. What is the sum of the second set
of numbers?
(1)10M-1
(2)10M +1
(3) 20
(4)100​

Answer 1

Step-by-step explanation:

this question is not understanding

Answer 2

Answer:

I think the answer is 20