How many four-letter code words are possible using the letters in XJTLU, if 1) the letters may be repeated? 2) the letters may not be repeated? Choose the option 'None among the others', if none of the other options is your answer. 4*4*4*4*4 5! 4! None among the others 5*5*5*5 5*5*5*5 4! | 4*4*4*4*4 5!

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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How many four-letter code words are possible using the letters in XJTLU, if
1) the letters may be repeated?
2) the letters may not be repeated?
Choose the option 'None among the others', if none of the other options is your
answer.
4*4*4*4*4
5!
4!
None among the others
5*5*5*5
5*5*5*5
4!
4*4*4*4*4
5!
Transcribed Image Text:How many four-letter code words are possible using the letters in XJTLU, if 1) the letters may be repeated? 2) the letters may not be repeated? Choose the option 'None among the others', if none of the other options is your answer. 4*4*4*4*4 5! 4! None among the others 5*5*5*5 5*5*5*5 4! 4*4*4*4*4 5!
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