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Quantitative Aptitude :: Probability - Discussion

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Choose the correct option.

A bag contains 4 white, 5 red and 6 blue balls. Three balls are drawn at random from the bag. The probability that all of them are red, is:

A1/22

B3/22

C2/91

D2/77

Answer: Option (Login/Signup)

Show Explanation

                                                                                 = (15*14*13)/(3*2*1)

                                                                                 = 455

n(E) = probability of getting red ball = 5c3 

                                                      = (5*2*1)/(3*2*1)

                                                      =10

P(getting red ball)= n(E)/n(s)

                           = 10/455

                               = 2/91

Asked In :: Wipro

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