Write the probability that a number selected at random from the set of first 100 natural numbers is a cube.

Find the sum of the first 100 natural numbers.

Find the sum of the first 100 natural numbers.

Find the sum of the first 100 natural numbers.

Write the sum of first n odd natural numbers.

Find the probability that a number selected at random from the numbers 1,2,3,...35 is a prime number (ii) multiple of 7 (iii) a multiple of 3 or 5

Write the sum of first n even natural numbers.

Write the sum of first n even natural numbers.

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

What is the probability that a number selected at random from the numbers 3, 4, 5, ......, 9 is a multiple of 4?

A weighted coin with the probability of showing a head is (2)/(3) is tossed. If head appears, then a number is selected from the the first 20 natural numbers otherwise a number is selected from the first 9 natural numbers. The probability of getting an even number is