[" Dample is "A" bag contains "4" balls.Two balls are drawn at random without replacement and are found "],[" tobexhite.What is the probability that all balls are white? "],[" soution since two balls drawn are white? So,we have the following possibilities: "],[" (i) The bag contains two white balls and "2" balls of other colour."],[" (ii) The bag contains "3" white balls and one ball of other colour."],[" (iii) The bag contains all white balls."],[" Consider the following events: "]