Question

Two teams play an extended series of 100 volleyball games. Team A wins the first game and then team B wins the second. The probability that a team wins each subsequent game is equal to the proportion of games that team has won so far. The probability that one of the teams wins exactly 30 games can be expressed as a/b.What is value of a and b

Answer 1

13

Answer 2

sorry, 13 is exactly what..
is it the value of a/b.
I want a+b.

Thank You for answering