Question

Four persons are selected at random from a group of 3 men, 2women and 4 children . The probability that exactly two of them are children is

Answer 1

Let the men be‘M’

women be‘W' and Children be ‘C'

Sample space= { M¹,M²M³,W¹,W²,C¹,C²,C³,C⁴}

n{S}= 9

Let the event that the two persons are children be A

n{A}= 4

P{A}= n{A}/n{S}= 4/9

Therefore probability is 4/9