   Chapter 9.9, Problem 3ES ### Discrete Mathematics With Applicat...

5th Edition
EPP + 1 other
ISBN: 9781337694193

#### Solutions

Chapter
Section ### Discrete Mathematics With Applicat...

5th Edition
EPP + 1 other
ISBN: 9781337694193
Textbook Problem
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# The instructor of a discrete mathematics class gave two teste. Twenty-five percent of the students received an A on the first test and 15% of the students received A’s on both test. What precent of the students who received A’s on the first test also received A’s on the second test?

To determine

Percentage of the student who received A on the first test also received A on the second test.

Explanation

Given information:

In two class tests results 25% of the students received an A on the first test and 15% of the students received an A on both the tests..

Calculation:

Let B= 25% of the students received an A on the first test.

C= x% of the students received an A on the second test.

BC= 15% of the students received an A on both the tests.

Apply conditional probability, P(B|A)=P(AB)P(A)

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