Subject
Quantitative Aptitude
Topic
Probability
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:
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:
ক)
2/91খ)
1/22গ)
3/22ঘ)
2/77Explanation
Let S be the sample space. Then, n(S) = number of ways of drawing 3 balls out of 15 = 15 c 3 = 455. Let E = event of getting all the 3 red balls. n(E) = 5 c 3 = = 10. => P(E) = n(E)/n(S) = 10/455 = 2/91.Related questions
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