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Probability refresher Flashcards | StudBud
Probability refresher
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A lock has a 4-digit code (0, 1, 2, 3, 4 or 5). How many codes are possible if 1st digit is 5 AND no digit is repeated?
A
1 + 5 + 4 + 3 = 13
B
6 X 5 X 4 X 3 = 360
C
1 X 5 X 4 X 3 = 60
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