Adaptive Practice
Probability
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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?
Easy
A die is rolled once. What is the probability of getting a number greater than 4?
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 3 white, 5 black, and 2 red balls. One ball is drawn at random. What is the probability that the ball is neither black nor red?
Medium
A die is rolled twice. What is the probability that the sum of the numbers obtained is 7?
Hard
A bag contains 4 red, 6 blue, and 5 green balls. Two balls are drawn one after another without replacement. What is the probability that both balls are red?
Hard
A box contains 10 bulbs, 3 of which are defective. If two bulbs are selected at random without replacement, what is the probability that at least one bulb is defective?
Hard
A die is rolled three times. What is the probability of getting exactly two sixes?
Medium
In a class of 40 students, 25 like football, 18 like cricket, and 10 like both. If a student is selected at random, what is the probability that the student likes football or cricket?