Question

Question 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 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 elementary events = 13

There are 5 male fishes in the tank.
$\therefore$ Favourable number of elementary events = 5

Hence, P (taking out a male fish)
$=\frac{Favourablenumberofelementaryevents}{Totalnumberofelementaryevents}=\frac{5}{13}$