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Algebra and Trigonometry (MindTap ...

4th Edition
James Stewart + 2 others
ISBN: 9781305071742

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Chapter
Section
BuyFindarrow_forward

Algebra and Trigonometry (MindTap ...

4th Edition
James Stewart + 2 others
ISBN: 9781305071742
Textbook Problem

6 1 - 7 4 Combinations These exercises involve counting combinations.

Choosing Exam Questions A student must answer seven of the ten questions on an exam. In how many ways can she choose the seven questions?

To determine

To find:

The number of ways in which student can choose the seven questions.

Explanation

Given:

The total number of questions in exam is 10.

The total number of questions to be chosen is 7.

Approach:

The number of combination (or selection) of n objects taken r at a time is

C(n,r)=n!r!(nr)!(1)

Calculation:

Substitute 10 for n, 7 for r in equation (1)

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Chapter 14 Solutions

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