An instructor gives his class a set of 10 problems with the information that the next quiz will consist of a random selection of 3 of them. If a student has figured out how to do 8 of t problems, what is the probability the he or she will answer correctly (a) all 3 problems? (b) at least 2 problems?

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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An instructor gives his class a set of 10 problems with the information that the next quiz will consist of a random selection of 3 of them. If a student has figured out how to do 8 of the
problems, what is the probability the he or she will answer correctly
(a) all 3 problems?
(b) at least 2 problems?
Transcribed Image Text:An instructor gives his class a set of 10 problems with the information that the next quiz will consist of a random selection of 3 of them. If a student has figured out how to do 8 of the problems, what is the probability the he or she will answer correctly (a) all 3 problems? (b) at least 2 problems?
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