Three natural numbers are taken at random from the set of first 100 natural numbers. The probability that their A.M. is 25, is

Three natural numbers are taken at random from the st of first 100 natural numbers.The probability that their A.M.is 25, is

Find the sum of the first 100 natural numbers.

Find the sum of first 25 natural numbers.

Three distinct numbers are chosen at random from the first 15 natural numbers. The probability that the sum will be divisible by 3 is

Find the HCF of the first 100 natural numbers.

If three numbers are selected from the set of the first 20 natural numbers, the probability that they are in GP, is

The average of first 100 natural number is:

A natural number is chosen at random from the first 100 natural numbers. What is the probability that the number chosen is a multiple of 2 or 3 or 5?