Question

What is answer of second question

Answer 1

1×1=1

2×2=4

3×3=9

4×4=16

5×5=25

6×6=36

7×7=49

Mean =Sum of observations

÷

No. of observations.

=1+4+9+16+25+36+49

÷

7

=140÷7

=20

20 is the answer

Answer 2

Answer: 20

For explanation I have given a pic...

It might help you