Question

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?

Answer 1

Total number of fish in the tank $=5+8=13$
$\therefore$ Total number of possible outcomes$=13$

There are 5 male fishes in the tank.
$\therefore$ Favourable number of outcomes (taking out a male fish) $=5$

Hence, P (taking out a male fish)
$=\frac{\text{Favourable number of outcomes}}{\text{Total number of possible outcomes}}=\frac{5}{13}$