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March 31, 2015

March 31, 2015

Posted by **Brianna** on Sunday, January 2, 2011 at 7:40pm.

A. what is the prob. that the Indians win the second game? B. What is the probability that the Indians win the second game given that they won the first game? Lost the first game? C. what is the probability that the Indians win the series? D. What is the probability the Indians win the series given that they won the first game? Lost the first game? E.What is the prob. that the Yankees win the first two games? that the Indians win the first two games? F. What is the probability the series goes to three games?

- Algebra -
**Damon**, Sunday, January 2, 2011 at 8:16pmA. independent events so 0.3

B. 0.3

C.

we want the sum of the probabilities that Indians win 2 games

That can happen several ways

1 1

1 0 1

0 1 1

first 1 1

.3*.3 = .09

now 1 0 1

.3*.7*.3 = .063

then 0 1 1

.7*.3*.3 = .063

sum = .216 answer to C.

for a check, see how the yankees do

.7*.7 = .49

.7*.3*.7 = .147

.3*.7*.7 = .147

sum = .784

total probability that one of the teams wins = .216+.784 = 1 check

D. they must win 2 or lose2 win 3

win #2 = .3

lose #2, win #3 = .7*.3 = .21

sum = .51

you can do the win both #2 and #3 = .09

E. .7*.7 = .49

.3*.3 = .09

F. 1 - probability that yankees win first two or indians win first two

1 - .49 - .09 = .42

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