Practice Problems on Ages – There is an unlimited stock of Blue, Red, White and Grey coloured balls. The balls of each colour are identical. Find the number of ways of selecting 12 balls from the stock?
Practice Probability – If A and B are 2 independent events and P(A)=0.5 and P(B) = 0.4, find P(A/B):
Practice Probability – A, B, C, D and E play the following game. Each person picks one card from cards numbered 1 through 10. The person who picks the greatest numbered card loses and is out of the game. Now the remaining four return their cards to the pack and draw again,the #erson with the greatest numbered card loses. This process is repeated till only one person is left in the -ame who is declared as the winner. ,What is the probability that A is the winner?
Practice Probability – The probability of occurrence of event A is 0.3 and that of event B is 0.4. The events are independent. What is the probability of occurrence of both A and B?
Practice Probability – A coin is tossed thrice. What is the probability that the first toss of coin lands head, second tail and third lands tail as well?
Practice Probability – A bag contains 5 yellow and 4 brown pencils. If two pencils are drawn, what is the probability that the pencils are of the same colour?
Practice Probability – An unbiased coin is tossed n times. If the probability of getting 4 tails equals the probability of getting 7 tails, then the probability of getting two tails is:
Practice Probability – X and Y are two independent events. The probability that X and Y occur is 1/12, and the probability that neither occur is 1/2, the probability of occurrence of X can be:
Practice Probability – A biased die has a probability of 1/4 of showing a 5, while the probability of any of 1, 2, 3, 4, or 6 turning up is the same . If three such dice are rolled, what is the probability of getting a sum of atleast 14 without getting a 6 on any die ?
Practice Probability – A box contains 10 balls numbered 1 through 10. Anuj, Anisha and Amit pick a ball each, one after the other, each time replacing the ball. What is the probability that Anuj picks a ball numbered less than that picked by Anisha, who in turn picks a lesser n
Practice Probability – A, B and C are three students who attend the same tutorial classes. If the probability that on a particular day exactly one out of A and B attends the class is 7/10; exactly one out of B and C attends is 4/10; exactly one out of C and A attends is 7/10.
Practice Probability – Three numbers are chosen from 1 to 30 randomly. The probability that they are not consecutive is:
Practice Probability – What is the probability for a day to be Sunday?
Practice Probability – The probability of occurrence of event X is 0.8 and that of event Y is 0.05. The events are mutually exclusive. What is the probability of occurrence of either X or Y?
Practice Probability – An unbiased dice is rolled 5 times and the outcomes are 1, 2, 3, 4 and 5 respectively. If it is rolled again, what is the probability that the outcome is 6?