a customer buys three packages and two of them are corrupted.                     e)  a customer buys three packages and one of them is corrupted.                     f)   a customer buys three packages and none of them are corrupted.

College Algebra (MindTap Course List)
12th Edition
ISBN:9781305652231
Author:R. David Gustafson, Jeff Hughes
Publisher:R. David Gustafson, Jeff Hughes
Chapter8: Sequences, Series, And Probability
Section8.CT: Chapter Test
Problem 30CT: In a batch of 20 tires, 2 are known to be defective. If 4 tires are chosen at random, find the...
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A computer store has 15 copies of a software package.  Unknown to the store, 3 of the packages have corrupted disks.  What is the probability that

 

 

           

d)  a customer buys three packages and two of them are corrupted.

           

 

 

 

 

e)  a customer buys three packages and one of them is corrupted.

 

 

 

 

           

f)   a customer buys three packages and none of them are corrupted.

 

 

 

 

 

           

g)  Find the sum of the probabilities in parts c–f and write an explanation for the sum.

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