Question

if the mean of first n natural numbers is 3n/5,then find value of n​

Answer 1

Answer:

mean = n(n+1)/2n,

mean = 3n/5

equating both

n=5

Step-by-step explanation:

Answer 2

Answer:

The value of n = 5

Step-by-step explanation:

Given,

• Mean of first n natural numbers = $\bold{\frac{3n}{5}}$

We know that,

• Mean of n natural numbers = $\bold{\frac{n+1}{2}}$

⇒ $\bold{\frac{n+1}{2}}$ = $\bold{\frac{3n}{5}}$

⇒ 5(n + 1) = 2(3n)

⇒ 5n + 5 = 6n

⇒ n = 5

Therefore the value of n = 5