4. A box of ten items contains 7 good and 3 defective items. If a sample of two items is selected, what is the probability that: a. Both will be good? b. Both will be defective? c. At least one will be good?

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
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Chapter1: Combinatorial Analysis
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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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4. A box of ten items contains 7 good and 3 defective items. If a sample of two items is selected, what is
the probability that:
a. Both will be good?
b. Both will be defective?
c. At least one will be good?
Transcribed Image Text:4. A box of ten items contains 7 good and 3 defective items. If a sample of two items is selected, what is the probability that: a. Both will be good? b. Both will be defective? c. At least one will be good?
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