1 answer

You need to follow the comments Three couple sits randomly in a row. What is the...

Question:

You need to follow the comments

Three couple sits randomly in a row. What is the probability that no husband sits beside his wife? (you need to use inclusion-exclusion formula and let all the event, such as P(AUB), P(A intersection B formula to calculate it, hints P(A)=1-P(A^c) )


Answers

16:42 There are three ways to select a couple who sit in adjacent seats. That gives us five objects to arrange, the couple an

16:43 When we subtracted arrangements in which a couple sits together, we counted seating arrangements in which all three cou16:43 times, once ror eacn or tne (2) Ways we couia have designated two of the three couples as the ones that sit together. T

Hence required probability = 1/3

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