If two numbers are selected at random from the numbers 1,2,3,4 determine the probability that their sum is odd when they are selected together.

If two numbers are selected at random from the numbers 1, 2, 3, 4 determine the probabilities that their sum is odd when they are selected (a) together (b) one by one with replacement.

A number is selected at random from the numbers 1 to 30. What is the probability that the selected number is a prime number?

Two numbers are selected at random from the integers 1 to 13. If the sum is even, find the probability that both numbers are odd

Two numbers are selected from first 40 natural numbers. The probability that the sum of two number is odd is:

A number x is selected at random from the numbers 1,4,9,16 and another number is selected at random from the numbers 1,2,3,4 .Find the probability that the value of xy is more than 16 .

From the set of numbers {1,2,3,4,5,6,7,8} two numbers are selected at random without replacement.The probability that their sum is more than 13 is

Three different numbers are selected at random from the set A=(1,2,3,...,10) The probability that the product of two of the numbers is equal to the third is

A number x is selected at random from the numbers 1,4,9,16 and another number y is selected at random from the numbers 1,2,3, 4.Find the probability that the value of xy is more than 16.

If two numbers are selected randomly from 20 consecutive natural numbers, find the probability that the sum of the two numbers is (i) an even number (ii) an odd number.