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24 May 2021, 02:15
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Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
55%
(hard)
Question Stats:
47% (00:47) correct
53%
(00:33)
wrong
based on 219
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How many different 4 letter combinations can be created from the letters A,B,C, and D?
A. 4
B. 8
C. 12
D. 24
E. 256
A. 4
B. 8
C. 12
D. 24
E. 256
24 May 2021, 03:23
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Depends of if repetition is allowed or not. Reading the question I assume that repetition is allowed in which case the answer is: 4*4*4*4 = 256 As we have four options and four spaces.
24 May 2021, 06:37
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As much I understand from the combination, then only 1 combination of 4 letters can be created with A,B, C, and D.
But if I say how many different arrangements can be created, then answer is 4!= 24.'
Now untill we are not told that whether repetition is allowed, we solve the problem considering repetition is not allowed.
The above is my understanding. Please correct me If I am wrong.
But if I say how many different arrangements can be created, then answer is 4!= 24.'
Now untill we are not told that whether repetition is allowed, we solve the problem considering repetition is not allowed.
The above is my understanding. Please correct me If I am wrong.
