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Finite Mathematics and Applied Calculus

Finite Mathematics and Applied…

Stefan Waner,… 7th Edition
Achievement 1,035 solutions

Questions asked

INSTANT ANSWER

Use the counting techniques from the last chapter. A bag contains three red marbles, two green ones, one fluorescent pink one, four yellow ones, and two orange ones. Suzan grabs four at random. Find the probability of the indicated event. She gets at least two red ones, given that she gets at least one green one. \( \square \)

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INSTANT ANSWER

A committee is to consist of a chair, two hagglers, and three do-nothings. The committee is formed by choosing randomly from a pool of 8 people and assigning them to the various "jobs." (a) How many different committees are possible? HINT [See Example 5.] 1680 \( \qquad \) - committees (b) Norman is eager to be the chair of the committee. What is the probability that he will get his wish? (Round your answer to two decimal places.) \( \qquad \) \[ 0.13 \] (c) Norman's girlfriend Norma is less ambitious and would be happy to hold any position on the committee provided that Norman is also selected as a committee member. What is the probability that she will get her wish and serve on the committee? (Round your answer to two decimal places.) \( \qquad \) \[ 0.54 \] (d) Norma does not get along with Oona (who is also in the pool of prospective members) and would be most unhappy if Oona were to chair the committee. Find the probability that all Norma's wishes will be fulfilled: She and Norman are on the committee, and it is not chaired by Oona. (Round your answer to two decimal places.) \( \square \)

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INSTANT ANSWER

A committee is to consist of a chair, two hagglers, and three do-nothings. The committee is formed by choosing randomly from a pool of 8 people and assigning them to the various "jobs." (a) How many different committees are possible? HINT [See Example 5.] 1680 \( \qquad \) \( \cdot \) committees (b) Norman is eager to be the chair of the committee. What is the probability that he will get his wish? (Round your answer to two decimal places.) \( \qquad \) \[ 0.13 \] (c) Norman's girlfriend Norma is less ambitious and would be happy to hold any position on the committee provided that Norman is also selected as a committee member. What is the probability that she will get her wish and serve on the committee? (Round your answer to two decimal places.) \( \qquad \) (d) Norma does not get along with Oona (who is also in the pool of prospective members) and would be most unhappy if Oona were to chair the committee. Find the probability that all Norma's wishes will be fulfilled: She and Norman are on the committee, and it is not chaired by Oona. (Round your answer to two decimal places.)

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INSTANT ANSWER

The Sorry State Lottery requires you to select five different numbers from 0 through 39 . (Order is not important.) You are a Big Winner if the five numbers you select agree with those in the drawing, and you are a Small-Fry Winner if four of your five numbers agree with those in the drawing. (Enter your answers as exact answers.) What is the probability of being a Big Winner? \[ 1 / 658008 \] What is the probability of being a Small-Fry Winner? 175/658008 What is the probability that you are either a Big Winner or a Small-Fry Winner?

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INSTANT ANSWER

Consider the following. (Assume that what is observed are the numbers that face up.) HINT [See Examples 1-3.] Two indistinguishable dice are rolled; the numbers add to 5 . Describe the sample space \( S \) of the experiment. (Select all that apply.) \( (7,7) \) \( (3,3)(3,4)(3,5)(3,6) \) \( (3,3)(3,4)(3,5)(3,6)(3,7) \) \( (4,4)(4,5)(4,6) \) \( (5,5)(5,6) \) \( (5,5)(5,6)(5,7) \) \( (2,2)(2,3)(2,4)(2,5)(2,6)(2,7) \) \( (6,6)(6,7) \) \( (1,1)(1,2)(1,3)(1,4)(1,5)(1,6) \) \( (4,4)(4,5)(4,6)(4,7) \) \( (2,2)(2,3)(2,4)(2,5)(2,6) \) \( (1,1)(1,2)(1,3)(1,4)(1,5)(1,6)(1,7) \) \( (6,6) \) List the elements of the given event. (Select all that apply.) \( (5,5)(5,6) \) \( (1,2) \) \( (3,4)(2,5)(1,6) \) \( (4,5)(3,6) \) \( (6,6) \) \( (1,4)(4,1)(2,3)(3,2) \) \( (1,4)(2,3) \) \( (4,4)(3,5)(2,6) \)

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INSTANT ANSWER

A bag contains two red marbles, two green ones, one lavender one, two yellows, and four orange marbles. HINT [See Example 7.] How many sets of five marbles include either the lavender one or exactly one yellow one but not both colors? \( \square \) sets

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INSTANT ANSWER

Telephone Numbers In the past, a local telephone number in a country consisted of a sequence of two letters followed by four digits. Three letters were associated with each number from 2 to 9 (just as in the standard telephone layout shown in the figure) so that each telephone number corresponded to a sequence of six digits. How many different sequences of six digits were possible? \( \square \) sequences

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INSTANT ANSWER

A test requires that you answer first Part A and then either Part B or Part C. Part A consists of 4 true-false questions, Part B consists of 4 multiple-choice questions with one correct answer out of five, and Part C consists of 3 multiple-choice questions with one correct answer out of six. How many different completed answer sheets are possible? \( \square \)

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INSTANT ANSWER

A computer byte consists of eight bits, each bit being either a 0 or a 1 . Assume that characters are represented using a code that uses a byte for each character. Some written languages, such as Chinese and Japanese, use tens of thousands of different characters. If a language uses roughly 11,000 characters, a computer code for this language would have to use how many bytes per character?

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INSTANT ANSWER

Find the present value PV of the given investment. (Round your answer to the nearest cent.) An investment earns 5\% per year and is worth \$40,000 after 4 years. \[ P V=\$ \square x \]

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