SOLUTION: 80% of Dr blunts pain tents have a flu injection. The probability of catching flu after having the injection is 1/40. The probability of catching flu after not having the injection

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Question 936018: 80% of Dr blunts pain tents have a flu injection. The probability of catching flu after having the injection is 1/40. The probability of catching flu after not having the injection is 13/20.
Calculate the probability that anyone of Dr blunts patients, selected at random, will catch the flu.
Answer by tommyt3rd(5050) About Me  (Show Source):
You can put this solution on YOUR website!
We will make some reasonable assumptions...
1st we assume P(a Blunt patient gets a flu injection)=0.8

P=(.8)(1/40)+(.2)(13/20)=0.15