Subject
Quantitative Aptitude
Topic
Probability
In a party there are 5 couples. Out of them 5 people are chosen at random. Find the probability that there are at the least two couples ?
In a party there are 5 couples. Out of them 5 people are chosen at random. Find the probability that there are at the least two couples ?
ক)
6/7খ)
19/21গ)
7/31ঘ)
5/21Explanation
Number of ways of (selecting at least two couples among five people selected) = (⁵C₂ x ⁶C₁) As remaining person can be any one among three couples left. Required probability = (⁵C₂ x ⁶C₁)/¹⁰C₅ = (10 x 6)/252 = 5/21Related questions
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