​ Let x1, x2 ....., xk be divisors of positive integer n (excluding 1 & n). If x1 + x2 +.....+ xk = 75, then is equal to ​

Question

Let x₁, x₂ ....., x_k be divisors of positive integer n (excluding 1 & n). If x₁ + x₂ +.....+ x_k = 75, then \(\sum\limits_{i = 1}^k \frac1{x_i}\) is equal to

a. \(\frac{75}{n^2}\)

b. \(\frac{75}{n}\)

c. \(\frac{75}{k}\)

d. none of these

Answer 1

Correct option is b. \(\frac{75}{n}\)