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A lottery game has balls numbered 1 through 15. What is the probability of selecting an even numbered ball or a 13?A. 715B. 25C. 815D. 78

User Iroyo
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1 Answer

4 votes
Given

The sample space


1,2,3,4,5,6,7,8,9,10,11,13,14,15

even number


2,4,6,8,10,12,14

Solution

Probability of selecting even number


(7)/(15)

Probability of selecting a 13


(1)/(15)

The Or Rule states that we can find the probability of either event A or event B occurring by adding the probability of event A and the probability of event B, as long as both events are mutually exclusive: P(A or B) = P(A) + P(B)


(1)/(15)+(7)/(15)=(8)/(15)The final answer
(8)/(15)

User Yery
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