Question 85795: How many three-digit numbers can you form from the digits 1, 2, 3, 4, 5, 6 if:
a.) the digits can be repeated
b.) The digits can not be repeated
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! How many three-digit numbers can you form from the digits 1, 2, 3, 4, 5, 6 if:
a.) the digits can be repeated
6^3 = 216
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b.) The digits can not be repeated
# of ways to pick three distanct numbers: 6C3 = [6*5*4]/[1*2*3] = 20
# of ways to arrange a particular group of three digits: = 3!=6
Total number of ways = 20*6 = 120 ways
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Cheers,
Stan H.
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