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) 7/15
B) 7/16
C) 7/19
D) 7/13
E) 7/11
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 ⁸8C2 ways.   = 7/15   7/15nswer: 7/15
<result>A</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?