Take FREE!! Online AMCAT Mock Test to Crack Wipro NLTH, Capgemini, etc.
Get Off-Campus Placement Jobs Info !!!
Practice Given Here Wipro NLTH Practice Q&A

# Quantitative Aptitude :: Probability - Discussion

Home > Quantitative Aptitude > Probability > MCQs Questions Discussion

11 / 72

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

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