Question

Sachin 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?

Answer 1

Let A be the event of taking out a male fish and B be the event of taking out a female fish.
∴ n (A) = 5 and n (B) = 8
Total number of fishes, n (S) = 13
∴ Probability that the fish taken out is male = $\frac{n\left(A\right)}{n\left(S\right)}=\frac{5}{13}$