A batch of 110 cellphones manufactured by a certain plant has 10 that are defective. Two cellphones are selected randomly without replacement from the batch. (Round off answers to 4 decimal places.) a. What is the probability that the second one is defective given that the first one was defective? b. What will be the answer for question a if the first cellphone selected is replaced to the batch before the second selection?

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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A batch of 110 cellphones manufactured by a certain plant has 10 that are defective. Two cellphones are selected randomly without replacement from the batch. (Round off answers to 4 decimal places.)


a. What is the probability that the second one is defective given that the first one was defective?

b. What will be the answer for question a if the first cellphone selected is replaced to the batch before the second selection?

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