Four persons are choosen at random from a group of 3 men, 2 women and 4 children. The probability of having 2 children out of 4 is :
Answer & explanation
Correct answer: option 3
Since we want exactly 2 of them to be children, we choose the 2 children first in 4C2=6 ways
Choose the other 2 people from the men and women in 5C2=10 ways
The universal set had 9C4=126 number of ways
Hence, probability is 10×6/126 = 10/21