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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?

neil hans , 15 Years ago
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Badiuddin askIITians.ismu Expert

Last Activity: 15 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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