Find the probability of winning a lottery with the following rule. Select the fo
ID: 3255385 • Letter: F
Question
Find the probability of winning a lottery with the following rule. Select the four winning numbers from 1, 2, . . . , 24. (In any order. No repeats.)
P(winning)=
The following data summarizes results from 1000 pre-employment drug screening tests. If one of the test subjects is randomly selected, find the probability that the subject had a positive test result or a negative test result.
Left column is Driver, Top column is Pedestrian
P(subject had a positive test result or a negative test result)=
Positive test result Negative test result Subject Uses Drugs 51 6 Subject Is not a drug user 86 857Explanation / Answer
P(subject had a positive test result or a negative test result) covers all the subjects because these are the only two possibilities.
Hence,
P(subject had a positive test result or a negative test result)
= 1
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