A bag contains 7 green and 8 white balls. If two balls are drawn simultaneously, the probability that both are of the same colour is	Choose the most appropriate option:	A) 8/15	B) 2/5	C) 3/5	D) 11/15	E) 7/15
Drawing two balls of same color from seven green balls can be done in ⁷C₂ ways.   Similarly from eight white balls two can be drawn in ⁸C₂ ways.   P = ⁷C₂/¹⁵C₂ + ⁸C₂/¹⁵C₂ = 7/15   ANSW7/15R:7/15
<result>E</result>
A bag contains 7 green and 8 white balls. If two balls are drawn simultaneously, the probability that both are of the same colour is