Three integers are chosen at random from the set of first 20 natural numbers. The chance that their product is a multiple of 3 is

Three numbers are chosen at random from the first 20 natural numbers. The probability that their product is even is

Three integers are chosen at random from the first 20 integers. The probability that their product is even is:

Three integers are chosen at random from the first 20 integers. The probability that their product is even is

Three numbers are chosen at random from the first 20 natural numbers. The probability that they are not consecutive is

Three integers are chosen at random from the first 20 integers. The probability that their product is even is 2/(19) b. 3/(29) c. (17)/(19) d. 4/(19)

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

The variance of first 20 - natural numbers is

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

A number is selected at random from first 50 natural numbers. Find the probability that it is a multiple of 3 and 4.

Two number aa n db aer chosen at random from the set of first 30 natural numbers. Find the probability that a^2-b^2 is divisible by 3.