SOLUTION: How many 4 letter code words can be made using letters in the word pencil if repetitions are permitted? If repetitions are not permitted?
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Question 653822: How many 4 letter code words can be made using letters in the word pencil if repetitions are permitted? If repetitions are not permitted?
Found 2 solutions by lynnlo, MathTherapy:
Answer by lynnlo(4176) (Show Source): You can put this solution on YOUR website!
pine,pile,nice,line
Answer by MathTherapy(10551) (Show Source): You can put this solution on YOUR website!
How many 4 letter code words can be made using letters in the word pencil if repetitions are permitted? If repetitions are not permitted?
Repetitions permitted:
1st letter: 6 letter-choices
2nd letter: 6 letter-choices
3rd letter: 6 letter-choices
4th letter: 6 letter-choices
Amount of 4-letter codes with repetitions permitted: , or
Repetitions not permitted:
1st letter: 6 letter-choices
2nd letter: 5 letter-choices
3rd letter: 4 letter-choices
4th letter: 3 letter-choices
Amount of 4-letter codes with repetitions not permitted: , or 6 * 5 * 4 * 3 =
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