Question

pls answer this question​

Answer 1

Answer:

I don't know this question s answer

Answer 2

Answer:

Hi

Step-by-step explanation:

First n natural numbers are 1,2,3...n

Mean =15

1+2+3+...+n/n= 15

We know that

n(n+1)/2

n(n+1)/2n= 15

n+1= 30

n=29