Adaptive Practice
Probability
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Easy
A fair six-faced dice is rolled once. What is the probability of getting a number greater than 4?
Easy
A bag contains 5 red balls, 3 green balls, and 2 blue balls. If a ball is drawn at random, what is the probability of drawing a green ball?
Easy
Two coins are tossed simultaneously. What is the probability of getting exactly one head?
Medium
A card is drawn from a well-shuffled deck of 52 cards. What is the probability of drawing a King or a Queen?
Medium
A box contains 7 white and 3 black balls. Two balls are drawn one after another without replacement. What is the probability that both balls are white?
Medium
A die is rolled twice. What is the probability that the sum of the numbers on the two dice is 9?
Hard
In a class of 40 students, 25 like cricket and 20 like football. If every student likes at least one of the two games, what is the probability that a student chosen at random likes both games?
Easy
A bag contains 4 red, 5 green, and 6 blue marbles. One marble is drawn at random. What is the probability that the marble is neither red nor blue?
Hard
A box contains 8 defective and 12 non-defective bulbs. Two bulbs are drawn at random one after another with replacement. What is the probability that both bulbs are defective?
Hard
A bag contains 3 white, 4 black, and 5 red balls. Two balls are drawn at random without replacement. What is the probability that both balls are of different colors?