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four person are choosen at random from a group of 3 mens, 2 womens, &4 childrens. find the probability of selecting exactly 2 children?

four person are choosen at random from a group of 3 mens, 2 womens, &4 childrens. find the probability of selecting exactly 2 children?

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1 Answers

Badiuddin askIITians.ismu Expert
147 Points
11 years ago

Dear neil hans

number of ways in which 4 person can be choosen =9C4

number of ways in which exactlt two children are choosen =4C2 *5C2


Probablity =4C2 *5C2  /9C4

               =6*10/126

                =10/21


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