Probability ncert solutions Chapter 15 Exercise 15.1 Question 11
11. 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. What is the probability that the fish taken out is a male fish?
Let E be the event that the fish taken out is male.
Number of possible outcomes favorable to E=Number of male fish=5
Total number of possible outcomes=total number of fish in the tank=5+8=13
P(E)=(Number of possible outcomes favorable to event E)/Total number of possible outcomes