Question

If the mean of first n natural numbers is 5n/9, then n =
A. 5
B. 4
C. 9
D. 10

Answer 1

Answer:

9

Step-by-step explanation:

Given that the mean of first n natural numbers = 5n/9. We know that mean of n natural numbers = (n + 1)/2. 9 = n. Therefore the value of n = 9.