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Essentials of Statistics for the B...

8th Edition
Frederick J Gravetter + 1 other
ISBN: 9781133956570

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Section
BuyFindarrow_forward

Essentials of Statistics for the B...

8th Edition
Frederick J Gravetter + 1 other
ISBN: 9781133956570
Textbook Problem

A jar contains 10 red marbles and 30 blue marbles.

  1. a. If you randomly select 1 marble from the jar, what is the probability of obtaining a red marble?
  2. 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,

Probability=Number of favourable outcomesTotal outcomes

Calculating the probability of obtaining a red marble:

p</

(b)

To determine

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

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