Gopi buys a fish from a shop for his aquarium. The shopkeeper takes out one fish at random from a tank containing 5 male fishes and 8 female fishes (see figure). What is the probability that the fish taken out is a male fish?

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Solution

Total number of fish in the tank = 5 + 8 = 13
∴ Total number of elementary events = 13
There are 5 male fishes in the tank.
∴ Favourable number of elementary events = 5
Hence, P (taking out a male fish)
=Favourable number of elementary events/Total number of elementary events=5/13

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Gopi buys a fish from a shop for his aquarium. The shopkeeper takes out one fish at random from a tank containing 5 male fishes and 8 female fishes (see figure). What is the probability that the fish taken out is a male fish?

Total number of fish in the tank = 5 + 8 = 13∴ Total number of elementary events = 13There are 5 male fishes in the tank.∴ Favourable number of elementary events = 5Hence, P (taking out a male fish)=Favourable number of elementary events/Total number of elementary events=5/13

Total number of fish in the tank = 5 + 8 = 13
∴ Total number of elementary events = 13
There are 5 male fishes in the tank.
∴ Favourable number of elementary events = 5
Hence, P (taking out a male fish)
=Favourable number of elementary events/Total number of elementary events=5/13