Adaptive Practice
Probability
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⏱ 0:30
Easy
A single die is rolled. What is the probability of getting a number greater than 4?
Easy
A bag contains 5 red balls and 3 green balls. If one ball is drawn at random, what is the probability of drawing a red 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?
Easy
A box contains 10 bulbs out of which 3 are defective. If one bulb is chosen at random, what is the probability that it is not defective?
Medium
A die is rolled twice. What is the probability that the sum of the numbers on the two dice is 7?
Medium
A box contains 4 red, 5 blue, and 6 green balls. If one ball is drawn at random, what is the probability that it is neither red nor green?
Hard
Two dice are rolled. What is the probability that the product of the numbers is 12?
Hard
A bag contains 3 white, 4 black, and 5 red balls. Two balls are drawn one after another without replacement. What is the probability that both balls are black?
Hard
A box has 6 defective and 14 non-defective pens. If 3 pens are drawn at random without replacement, what is the probability that exactly 2 are defective?