The names of 9 boys and 2 girls in a hat. What is the probability of first drawing a girls name then a boys name from the hat?

A - drawing a girls name at first

P (A) = 2 / (2+9) = 2/11

B - drawing a boys name in second drawing if first drawing was a girls name

P (B) = 9/10

C - drawing a girls name firstly and a boys name secondly

P (C) = P (A) * P (B) = 2/11 * 9/10 = 9/55

ans: 9/55