Fred and Gina are playing tennis. The first player to win 2 sets wins their match. Fred has a 3/5 chance to win each set while Gina has a 2/5 chance. What is the probability that the match is decided in only two sets?

Respuesta :

From the information below the games is over in 3 sets. For Gina to win the match there are 3 possibilities.

1) Gina wins the first 2 sets with probability

2)Gina wins the first set. Looses the next set. Wins the third set.

3)Gina looses the first set. Wins the next 2 sets.

The required probability that Gina wins is the sum of the above 3 probabilities . That is the probability that Gina wins the match is

Answer:[tex] P=\frac{9+4}{25}=\frac{13}{25}[/tex]

Step-by-step explanation:

Given

Fred has a chance of 3/5 to win

and Gina has a chance of 2/5 to win

Probability(P) that the match is decided in only two sets is when

Either Fred or Gina win both matches continuously

P=P(Fred win both match)+P(Gina win both match)

[tex]P=\frac{3\times 3}{5\times 5}+\frac{2\times 2}{5\times 5}[/tex]

[tex] P=\frac{9+4}{25}=\frac{13}{25}[/tex]