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Selecting Books Find the probability of selecting 3 science books and 4 math books from 8 science books and 9 math books. The books are selected at random.

Intro Stats / AP Statistics

Chapter 4

Probability and Counting Rules

Section 5

Sampling and Data

Probability Topics

Missouri State University

Piedmont College

Cairn University

Idaho State University

Lectures

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01:21

For Exercises $20-23,$ det…

01:07

Three books are picked fro…

00:25

Reasoning Explain whether …

01:11

There are 3 books of poetr…

01:00

A school library classifie…

00:31

00:48

00:57

A random number generator …

02:08

BOOKS Dan has twelve books…

00:44

in this problem. Suppose we have eight science books and nine math books, and we randomly select seven books out of them on what is the probability that we have three science bits and four math books? Um, so the probability Oh, this result equals the number off. Favorable results divided by the total number of possible are the possible results. So the probability of having three signs books and form US books equals now the the total number of all the possible results equals, um 17. Choose seven. Because we have 17 books in total on the numerator should be here. We do this in two steps. Um, the first step would be to choose three science books out of eight, so this should be eight. Choose three. Now, the second step is to choose for math books out of nine, and the first step on the second are independent. So, um, we multiply the two results, so this is nine choose for, and the result is 56 times 126 divided by, and the final result goes to point 363

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