SOLVE
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Question 1 of 20 |
1.0 Points |
The staff at a small company includes: 4 secretaries, 20 technicians, 4 engineers, 2 executives, and 50 factory workers. If a person is selected at random, what is the probability that he or she is a factory worker?
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A. 1/4 |
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B. 1/8 |
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C. 5/8 |
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D. 2/5 |
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Question 2 of 20 |
1.0 Points |
If the probability that it will rain tomorrow is 0.38, then the probability that it will not rain tomorrow is:
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A. 0.38 |
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B. -0.38 |
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C. 0.62 |
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D. 1.38 |
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Question 3 of 20 |
1.0 Points |
If a die is rolled one time, find the probability of getting a number greater than 2.
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A. 2 |
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B. -1 |
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C. 5/6 |
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D. 4/6 |
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Question 4 of 20 |
1.0 Points |
In a recent study, the following data were obtained in response to the question, “Do you favor recycling in your neighborhood?”
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Yes |
No |
No Opinion |
Males |
25 |
15 |
10 |
Females |
30 |
10 |
10
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If a person is picked at random, what is the probability that the person is either male or has no opinion regarding recycling?
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A. 3/5 |
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B. 3/10 |
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C. 4/5 |
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D. 7/10 |
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Question 5 of 20 |
1.0 Points |
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 .
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A. 2/15 |
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B. 2/3 |
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C. 1/5 |
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D. 2/5 |
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Question 6 of 20 |
1.0 Points |
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
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A. 5 |
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B. 8 |
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C. 15 |
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D. 30 |
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Question 7 of 20 |
1.0 Points |
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?
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A. 0.0264 |
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B. 0.0531 |
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C. 0.0347 |
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D. 0.0482 |
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Question 9 of 20 |
1.0 Points |
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?
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A. 48 |
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B. 16 |
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C. 28 |
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D. 3 |
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Question 10 of 20 |
1.0 Points |
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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.
Question 11 of 20 |
1.0 Points |
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What probability value would be needed to complete the following probability distribution?
X |
-2 |
-1 |
0 |
1 |
2 |
P(X) |
0.13 |
0.14 |
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0.16 |
0.29 |
Place your answer in the blank
Question 12 of 20 |
1.0 Points |
The probability distribution associated with the number of cartoons watched by Mrs. Kelly's first grade class on Saturday morning is shown below.
x |
P(x) |
0 |
0.15 |
1 |
0.20 |
2 |
0.30 |
3 |
0.10 |
4 |
0.20 |
5 |
0.05 |
Find the standard deviation for the probability distribution above.
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A. 1.46 |
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B. 2.25 |
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C. 1.89 |
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D. 1.18 |
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Question 13 of 20 |
1.0 Points |
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?
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A. $3.06 |
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B. -$2.78 |
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C. -$3.06 |
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D. $2.78 |
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Question 14 of 20 |
1.0 Points |
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.
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A. 0.19 |
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B. 0.17 |
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C. 0.08 |
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D. 0.23 |
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Question 15 of 20 |
1.0 Points |
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?
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A. 0.081 |
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B. 0.243 |
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C. 0.027 |
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D. 0.003 |
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Question 17 of 20 |
1.0 Points |
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
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A. 6.00 |
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B. 1.50 |
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C. 4.00 |
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D. 10.00 |
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Question 18 of 20 |
1.0 Points |
A die is rolled 360 times. Find the standard deviation for the number of 3s that will be rolled.
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A. 60 |
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B. 50 |
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C. 7.1 |
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D. 5.9 |
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Question 19 of 20 |
1.0 Points |
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?
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A. 138.1 |
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B. 171.2 |
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C. 90.7 |
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D. 153.8 |
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