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
A single die is rolled. What is the probability of getting a number greater than 4?
Easy
Two coins are tossed simultaneously. What is the probability of getting exactly one head?
Medium
A box contains 4 white, 5 black, and 6 red balls. One ball is drawn at random. What is the probability that the ball drawn is neither white nor red?
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 has 3 defective and 7 good bulbs. One bulb is drawn at random. What is the probability that the bulb is good?
Hard
A bag contains 2 red, 3 blue, and 5 green balls. Two balls are drawn at random without replacement. What is the probability that both are blue?
Medium
A box contains 10 balls numbered 1 to 10. One ball is drawn at random. What is the probability that the number on the ball is a multiple of 3 or 5?
Hard
From a pack of 52 cards, two cards are drawn one after another without replacement. What is the probability that both cards are aces?
Hard
A box contains 8 balls: 3 white and 5 black. Two balls are drawn at random without replacement. What is the probability that one ball is white and the other is black?