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If Jeff has four movies, and must choose to watch either 1
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30 Dec 2017, 14:04
30 Dec 2017, 14:04
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Question Stats:
13% (01:04) correct
86% (01:01) wrong based on 36 sessions
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If Jeff has four movies, and must choose to watch either 1, 2, or 3 different movies, which of the following represents a possible number of different arrangements of movies that Jeff could watch?
Indicate all possible values.
A. 4
B. 6
C. 7
D. 9
E. 12
F. 24
Indicate all possible values.
A. 4
B. 6
C. 7
D. 9
E. 12
F. 24
Drill 2
Question: 2
Page: 563
Question: 2
Page: 563
Re: If Jeff has four movies, and must choose to watch either 1
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08 Jan 2018, 16:23
08 Jan 2018, 16:23
Expert Reply
Explanation
If Jeff watches one movie, he has four different choices for that one movie, so choice (A) is a correct answer. To find the total number of arrangements of two movies, first write out two slots.
For the first movie, he has 4 choices and a 4 goes in the first slot. For the second movie, he now has three choices and a 3 goes in the second slot. 4 × 3 = 12, so choice (E) is correct.
There are 24 arrangements if he watches three movies: 4 × 3 × 2 = 24. Choice (E) is also correct.
Hence options A, E, and F are correct!
If Jeff watches one movie, he has four different choices for that one movie, so choice (A) is a correct answer. To find the total number of arrangements of two movies, first write out two slots.
For the first movie, he has 4 choices and a 4 goes in the first slot. For the second movie, he now has three choices and a 3 goes in the second slot. 4 × 3 = 12, so choice (E) is correct.
There are 24 arrangements if he watches three movies: 4 × 3 × 2 = 24. Choice (E) is also correct.
Hence options A, E, and F are correct!
Re: If Jeff has four movies, and must choose to watch either 1
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19 Oct 2020, 00:24
19 Oct 2020, 00:24
1
shouldn't we add up all the outcomes as wording "or" is used and get only one answer.?
