Four person are chosen at random form a group of 3 men, 2 women and 4 children. The chance that exactly 2 of them are children, is: Choose the correct choice from the following answers.
A) 10/21 B) 20/21 C) 17/21 D) 19/21 E) 14/21
Number of ways of choosing 4 persons out of 9   =9c4   =126   No.of ways of choosing 2 children out of 4 and 2 persons out of (3+2)= (4c2+5c2)   =60   P(E)=60/126   =10/21   10/21NSWE 10/21 10/21
<result>A</result>
Four person are chosen at random form a group of 3 men, 2 women and 4 children. The chance that exactly 2 of them are children, is: