A pollster randomly selected four of 10 available people. Required: How many different groups of 4 are possible? What is the probability that a person is a member of a group? Note: Round your answer to 3 decimal places.

A pollster randomly selected four of 10 available people. Required: How many different groups of 4 are possible? What is the probability that a person is a member of a group? Note: Round your answer to 3 decimal places.

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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Question

A pollster randomly selected four of 10 available people.

Required:

How many different groups of 4 are possible?
What is the probability that a person is a member of a group?

Note: Round your answer to 3 decimal places.

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Follow-up Question

A pollster randomly selected four of 10 available people.

Required:

(The answer to this part was incorrect) (0.400)

What is the probability that a person is a member of a group?

Note: Round your answer to 3 decimal places.

Solution

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