Problem Solving (PS) | Doubt in reverse probability method

Given that there are 5 married couples. If we select only 3 people out of the 10, what is the probability that
none of them are married to each other?



A) 1/3
B) 2/3
C) 1/9
D) 7/9
E) 1/12




PS:

Can someone show how to solve this using reverse probability method because i'm getting 1-(1*1/9*1)=8/9 as the answer.

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