Discrete Probability and Expected Values

Discrete Probability and Expected Values

11th Grade

•

20 Qs

quiz-placeholder

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Discrete Probability and Expected Values

Discrete Probability and Expected Values

Assessment

Quiz

•

Mathematics

•

11th Grade

•

Practice Problem

•

Hard

Created by

Anthony Clark

Used 2+ times

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20 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

In a certain community, 30% of households have 1 child, 43% have 2 children, and 27% have 3 children. If a household is selected at random, what is the expected number of children in that household?

2.00

2.13

1.97

1.27

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

A discrete random variable X has the probability distributions shown in the table. Find the value of k.

1/3

7/12

1/12

1/4

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

Determine which of the following distribution is NOT a probability distribution.

A

B

C

D

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A marketing survey compiled data on the number of cars in households.  If X = the number of cars in a randomly selected household, and we omit the rare cases of more than 5 cars, then X has the following probability distribution: 
X           0          1          2          3           4           5    
P(X)   0.24    0.37    0.20    0.11    0.05     0.03
What is the probability that a randomly chosen household has at least two cars?

0.20

0.29

0.39

0.61

5.

MULTIPLE CHOICE QUESTION

1 min • 12 pts

A stockbroker estimates that at the end of the year, there is a 40% chance a stock will be worth $50, a 35% chance it will be worth $60 and a 25% chance it will be worth $70.
What expected value does this broker assign to this stock's end-of-the-year price?

$58.50

$60.00

$62.50

$65.00

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

A

B

C

D

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

A

B

C

D

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