question_answer

Five horses are in a race. Mr A selects two of the horses at random and bets on them. The probability that Mr A selected the winning horse, is     AIEEE  Solved  Paper-2003

A) \[\frac{4}{5}\]                                   

B)       \[\frac{3}{5}\]                                   

C)       \[\frac{1}{5}\]                                                   

D) \[\frac{2}{5}\]

Correct Answer: D

Solution :

The sum of the probability of an event and its complementary is 1. So, the probability of the complementary event is . The probability that Mr A selected the loosing horse The probability that Mr A selected the winning horse