Question

pls answer fast pls
I will mark u as branlist​

Answer 1

1. 4 (sum of all no./ total no. of obs.)

2. 7 (same formula used for solving 1.)

3. 120 (mean×no. of obs.)

4. 4.25 (first four prime no. are 2,3,5,7)

5. 15 (find the sum of 4 no. by formula used in solving 3 and then subtract the sum of three digit from the sum u find by mean×no. of obs.)