A bag contains 4 green and 8 white balls. If two balls are drawn simultaneously, the probability that both are of the same colour is	Choices
A) 8/15
B) 2/5
C) 3/5
D) 11/15
E) 17/33
Drawing two balls of same color from four green balls can be done in 4C₂ ways.   Similarly from eight white balls two can be drawn in ⁸C₂ ways.   P = 4C₂/¹⁵C₂ + ⁸C₂/¹⁵C₂ = 17/33   ANSW17/33R:17/33
<result>E</result>
A bag contains 4 green and 8 white balls. If two balls are drawn simultaneously, the probability that both are of the same colour is