SOLUTION: Write a system of two equations in two unknowns for each problem. Solve each system by the method of your choice. Please help!!! I'm having the hardest time with this. Thanks Th

Question 179159: Write a system of two equations in two unknowns for each problem. Solve each system by the method of your choice. Please help!!! I'm having the hardest time with this. Thanks
The probability that San Francisco plays in the next Super Bowl is nine times the probability that they do not play in the next Super Bowl. The probability that San Francisco plays in the next Super Bowl plus the probability that they do not play is 1. What is the probability that San Francisco plays in the next Super Bowl?
Answer by edjones(8007) (Show Source): You can put this solution on YOUR website!
Let p be the probability that they play.
Let n be the probability that they don't.
.
p=9n
p+n=1
.
9n+n=1 Substitute for p.
10n=1
n=.1
p=.9
.
Ed

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