Find the probability that a leap year will have 53 Fridays or 53 Saturdays.
The probability of hitting a target by three marksmen are 1/2, 1/3 and 1/4. Then find the probabi9lity that one and only one of them will hit the target when they fire simultaneously.
A and B are two events such that P(A)=0.54, P(B)=0.69and P(A∩B)=0.35.Find
Two dice are thrown. What is the probability that the sum of the numbers appearing on the two dice is 11, it 5 appears on the first?
Three persons work independently on a problem. If the respective probabilities that they will solve it are 1/3, 1/4 and 1/5, then find the probability that none can solve it.
Gopi buys a fish from a shop for his aquarium. The shopkeeper takes out one fish at random from a tank containing 5 male fish and 8 female fish (see Figure). What is the probability that the fish taken out is a male fish?
A child has a die whose six faces show the letters as given below:A,B,C,D,E,A.The die is thrown once. What is the probability of getting (i) A? (ii) D?