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

If two numbers are selected at random from the set of first 20 natural numbers, then the probability of getting a number less than 13 and the other greater than 17 is

Three distinct numbers are selected from the first 100 natural numbers. The probability that all the three numbers are dicisible by 2 and 3 is

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

Two number are randomly selected from the set of first 9natural numbers.If 'p' be the probability that their sum is odd given one of the selected digit is 2 and 'q' be the probability that 2 is one of the selected digit given their sum is odd then.

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

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

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

If a number is selected from the first 30 natural numbers, then the probability that the number selected is divisible by 4 or 7, is