Probability

Q. A box contains 3 blue, 4 white, and 5 red marbles. If a marble is drawn at random from the box, what is the probability that it will be white?

Q. It is given that in a group of 3 students, the probability of 2 students not having the same birthday is 0.992. What is the probability that the 2 students have the same birthday?

Q. A bag contains 3 red balls and 5 black balls. A ball is drawn at random from the bag. What is the probability that the ball drawn is not red?

Q. A die is thrown once. Find the probability of getting a prime number.

Q. If two dice are rolled together, the number of possible outcomes would be

Q. A game consists of tossing a one rupee coin 3 times and noting its outcome each time.
David wins if all the tosses give the same result i.e., three heads or three tails, and loses otherwise. Calculate the probability that David will lose the game.

Q. A bag contains 5 red balls and some blue balls. If the probability of drawing a blue ball is double that of a red ball, determine the number of blue balls in the bag.

Q. A deck of cards is well-shuffled. One card is then picked up at random. What is the probability that the card is the queen?