A bag contains p white and q black ball. Two players A and B alternately draw a ball from the bag, replacing the balls each time after the draw till one of them draws a white ball and wins the game. If A begins the game and the probability of A winning the game is three times chat of B, then the ratio p:q is:

A bag contains p white and q black ball. Two players A and B alternate

1.	A bag contains p white and q black ball. Two players A and B alternately draw a ball from the bag, replacing the balls each time after the draw till one of them draws a white ball and wins the game. If A begins the game and the probability of A winning the game is three times chat of B, then the ratio p:q is:
A.	0.127777777777778
B.	0.16875
C.	0.0840277777777778
D.	1 : 2
Answer» D. 1 : 2

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