Out of a pack of 52 cards one is lost, from the remainder of the pack , two cards are drawn and are found to be spades .Find the chance that the missing card is a spade ?
correct answer:-2
A bag contains 5 red, 4 green and 3 black balls. Three balls are drawn out from it at random. Find the probability of drawing exactly 2 red balls
correct answer:-5
DIRECTION for the question: Solve the following question and mark the best possible option.
Two cards are drawn together from a pack of 52 cards. The probability that one is a spade and one is a heart, is
correct answer:-4
If the integers a and b are chosen at random from 1 to 100, then the probability that a number of the form $$7^{a}+ 7^{a}$$ is divisible by 5, equal to:
correct answer:-2