Three dice are rolled together. What is the probability of rolling a sum of 15?
5/108
A box contains 15 light bulbs, 4 of which are defective. Abulb i sselected at random. What is the probability that it is not defective?
11/15
Two dice are rolled together. What is the probability of obtaining a sum less than 6?
5/18
A child is throwing darts at the board shown in the figure. The radii of the circles on the board are 3 cm, 6 cm and 9 cm respectively. What is the probability that the child's dart lands in the red circle, given that it hits the board?
1/9
An urn contains 3 black, 4 red and 2 blue marbles. What is the probability that a marble drawn at random is not blue?
7/9
Two dice are rolled. What is the probability that their sum is divisible by 4?
1/4
A coin is tossed four times. What is the probability that the coin shows tails at least once?
15/16
The integers 1 through 15 are written on separate cards. You are asked to pick a card at random. What is the probability that you pick a prime number?
2/5
A number is drawn at random from the set A= {1, 2, 3, ... ,100}. What is the probability that the number is divisible by both 2 and 3?
4/25
Two dice are rolled. What is the probability that their sum is a prime number?
5/12
An urn contains five blue marbles, four red marbles and sxi yelow marbles. We want ot take one marble from the urn. What is the probability of taking a red or a yellow marble?
2/3
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