SOLVE

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Question 1 of 2 Save Time On Research and Writing Hire a Pro to Write You a 100% Plagiarism-Free Paper. Get My Paper 0

1.0 Points

The staff at a small company includes:

4

secretaries, 20 technicians, 4 engineers, 2 executives, and

5

0 factory workers. If a person is selected at random, what is the probability that he or she is a factory worker?

A. 1/4

B. 1/8

C. 5/8

D. 2/5

1.0 Points

Question 2 of 20

If the probability that it will rain tomorrow is 0.

3

8, then the probability that it will not rain tomorrow is:

A. 0.38

B. -0.38

C. 0.62

D. 1.38

1.0 Points

Question 3 of 20

If a die is rolled one time, find the probability of getting a number greater than 2.

A. 2

B. -1

C. 5/6

D. 4/6

1.0 Points

Question 4 of 20

In a recent study, the following data were obtained in response to the question, “Do you favor recycling in your neighborhood?”

 

		Yes	No	No Opinion
Males	25	15	10
Females	30	10	10

      If a person is picked at random, what is the probability that the person is either male or has no opinion regarding recycling?

A. 3/5

B. 3/10

C. 4/5

D. 7/10

1.0 Points

Question 5 of 20

A jar contains four white marbles, five red marbles, and six black marbles. If a marble is selected at random, find the probability that it is white or black .

D. 2/5

A. 2/15

B. 2/3

C. 1/5

1.0 Points

Question 6 of 20

A furniture manufacturer offers bookcases in 5 different sizes and 3 different colors. If every color is available in every size, then the total number of different bookcases is

A. 5

B. 8

C. 15

D. 3 0

1.0 Points

Question 7 of 20

A gumball machine contains 300 grape flavored balls, 400 cherry flavored balls, and 500 lemon flavored balls. What is the probability of getting 1 grape ball, 1 cherry ball, and 1 lemon ball if each ball was removed and then replaced before choosing the next from the machine?

A. 0.0264

B. 0.05 31

C. 0.0347

D. 0.0482

1.0 Points

Question 8 of 20 1.0 Points It has been reported that 3% of all cars on the highway are traveling at speeds in excess of 70 mph. If the speeds of four random automobiles are measured via radar, what is the probability that at least one car is going over 70 mph? Place your answer, rounded to four decimal places, in the space.

Question 9 of 20

If a menu has a choice of 4 appetizers, 4 main courses, and 3 desserts, then the sample space for all possible dinners has how many outcomes?

A. 48

B. 16

C. 28

D. 3

1.0 Points

Question 10 of 20

A certain system has two components. There are 10 different models of the first component and 10 different of the second. Any first component can be paired with any second component. A salesman must select 2 of the first component and 3 of the second to take on a sales call. How many different systems can the salesman select? Place your answer in the blank. Do NOT use commas. For example, 2350 would be a legitimate response.

1.0 Points

Question 11 of 20

What probability value would be needed to complete the following probability distribution?

 

 

X	-2	-1		0		1		2
P(X)	0.13	0.14	0.16	0.29

 

            Place your answer in the blank

1.0 Points

Question 12 of 20

The probability distribution associated with the number of cartoons watched by Mrs. Kelly’s first grade class on Saturday morning is shown below. 

 

0

1

2

0.20

x	P(x)
0.15
	0.20
0.30
3	0.10
4
5	0.05

 

      Find the standard deviation for the probability distribution above.

A. 1.46

B. 2.25

C. 1.89

D. 1.18

1.0 Points

Question 13 of 20

If a gambler rolls two dice and gets a sum of 10, he wins $10, and if he gets a sum of three, he wins $20. The cost to play the game is $5. What is the expectation of this game?

A. $3.06

B. -$2.78

C. -$3.06

D. $2.78

1.0 Points

Question 14 of 20

If a student randomly guesses at 20 multiple-choice questions, find the probability that the student gets exactly four correct. Each question has four possible choices.

A. 0.19

B. 0.17

C. 0.08

D. 0.23

1.0 Points

Question 15 of 20

A pet supplier has a stock of parakeets of which 10% are blue parakeets. A pet store orders 3 parakeets from this supplier. If the supplier selects the parakeets at random, what is the chance that the pet store gets exactly one blue parakeet?

A. 0.081

B. 0.243

C. 0.027

D. 0.003

Question 16 of 20 1.0 Points If 1.5% of the bolts made by an automotive factory are defective, what is the probability that in a shipment of 200 bolts, there are 6 defective bolts? Place your answer, rounded to four decimal places, in the blank.

1.0 Points

Question 17 of 20

A multiple choice quiz consists of 6 questions, each with 4 possible answers. If a student guesses at the answer to each question, then the mean number of correct answers is

A. 6.00

B. 1.50

C. 4.00

D. 10.00

1.0 Points

Question 18 of 20

A die is rolled 360 times. Find the standard deviation for the number of 3s that will be rolled.

A. 60

B. 50

C. 7.1

D. 5.9

1.0 Points

Question 19 of 20

The failure rate for taking the bar exam in Philadelphia is 41%. If 375 people take the bar exam, what is the mean for the number of failures?

A. 138.1

B. 171.2

C. 90.7

D. 153.8

Question 20 of 20 1.0 Points In a survey, 55% of the voters support a particular referendum. If 40 voters are chosen at random, and X is the number of voters that support this referendum, find the mean and variance of X. Place the mean in the first blank and place the variance in the second blank.