From nominated 1 women and 3 men, the pair of persons to serve on a committee can be chosen by= = 2*3 = 6 different ways. Here 4 = 1 + 3 is the total number of nominated persons. We consider here non-ordered pairs, since the difference in their positions/duties is not specified. Of this total number of pairs, the pairs containing one woman can be selected by 3 different ways. So, the probability under the question is = . ANSWER