<span>The total number of students in the class is 9 + 7 = 16
The probability first person is a girl is 9/16
The probability second person is a girl is 8/15
The probability third person is a girl is 7/14
The probability that three girls are the first to enter is 9/16 * 8/15 * 7/14 = 504/3360 = 0.15. Option A.</span>
