If four marbles are picked at random, what is the probability that at least one is blue ?
A). 4/15
B). 69/91
C). 11/15
D). 22/91
1. Probability of occurrence of an event lies between
3. A coin is tossed live times. What is the probability that there is at the least one tail?
4. In a throw of dice what is the probability of getting number greater than 5
9. If in a binomial distribution n = 1 then E(X) is
10. If the occurrence of one event means that another cannot happen, then the events are