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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 fish and 8 female fish (see Fig. 15.4). What is the probability that the fish taken out is a male fish?

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 (see Fig. 15.4). What is the probability that the fish taken out is a male fish?

          

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Total number of fishes in the tank = 5 (male) + 8 (female) = 13

Let E be the event that the fish taken out is a male fish.

Number of possible outcomes = 13

Number of outcomes favourable to E = 5

\therefore P(E) = \frac{favourable\ outcomes}{total\ outcomes} = \frac{5}{13}

Therefore, the probability that the fish are taken out is a male fish is \frac{5}{13}

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HARSH KANKARIA

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