Question

What is the method and answer of the question?

Answer 1

Hey mate here is your answer...

Mean of four numbers mean x1+x2+x3+x4/4

so mean will be

x-5+x-1+x+x+2/4

4x-4/4

4(x-1)/4

x-1

Answer 2

Here is you answer

I will wait for your next question.