Out of numbers 1 to 9, two numbers are chosen at random, so that their sum is even number. The probability that the two chosen numbers are odd

Out of numbers 1,2,3,….9, two numbers are chosen at random, so that their sum is an even number. The probability for the two chosen numbers to be odd is

A number is chosen at random from the first 11 natural numbers, then the probability that the chosen number is even, is -

Three numbers are chosen at random from numbers 1to 30.Write the probability that the chosen number are consecutive.

Three numbers are chosen at random from numbers 1 to 30. Write the probability that the chosen number are consecutive.

Two numbers are selected at random from integers 1through 9.If the sum is even,find the probability that both the numbers are odd.

A number is chosen at from the first 11 natural number, then the probability that the chosen number is even 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

Two numbers are selected at random from integers 1 through 9. If the sum is even, find the probability that both the numbers are odd.