Chapter 6.1, Problem 2LC

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8th Edition

Frederick J Gravetter + 1 other

ISBN: 9781133956570

Textbook Problem

A jar contains 10 red marbles and 30 blue marbles.

**a.**If you randomly select 1 marble from the jar, what is the probability of obtaining a red marble?**b.**If you take a*random sample*of*n*= 3 marbles from the jar and the first two marbles are both blue, what is the probability that the third marble will be red?

**(a)**

To determine

**To find:** The probability of obtaining a red marble.

Explanation

**Given info:**

The information shows that a jar contains 10 red marbles and 30 blue marbles.

**Calculation:**

The formula for calculating the probability is,

*Calculating the probability of obtaining a red marble*:

**(b)**

To determine

**To find:** The probability that the third marble will be red marble.

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