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Essentials of Statistics for the B...

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

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BuyFindarrow_forward

Essentials of Statistics for the B...

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

A survey of the students in a psychology class revealed that there were 19 females and 8 males. Of the 19 females, only 4 had no brothers or sisters, and 3 of the males were also the only child in the household. If a student is randomly selected from this class,

  1. a. What is the probability of obtaining a male?
  2. b. What is the probability of selecting a student who has at least one brother or sister?
  3. c. What is the probability of selecting a female who has no siblings?

(a)

To determine

To find: The probability of obtaining a male.

Explanation

Given info:

The survey conducted by psychology class students. In that survey it is revealed that out of 19 females only 4 had no brothers or sisters and out of 8 males only 3 had no brothers or sisters.

Calculation:

The formula for calculating the probability is,

Probability=Number of favourable outcomesTotal outcomes

Calculating probability of obtaining a m

(b)

To determine

To find: The probability of selecting a student who has at least one brother or sister.

(c)

To determine

To Find: The probability of selecting a female who has no siblings.

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