6 married

6 married couples are in a room, if 2 people are chosen at random. Find the probability that;
a). they are married.
b). one is male and one is female.

Correct answer:

a =  0.0909
b =  0.5455

Step-by-step explanation:

C2(12)=(212)=2!(122)!12!=211211=66  n=(212)=66  C1(6)=(16)=1!(61)!6!=16=6  a=n(16) 1=666 1=111=0.0909
b=n(16) (16)=666 6=116=0.5455

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