SOLUTION: You find a locked treasure box. There are 40 numbers on the dial 0-39 You also find a clue that says that the combination that opens the lock contains repeats in the 3 number combi
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Question 1075841: You find a locked treasure box. There are 40 numbers on the dial 0-39 You also find a clue that says that the combination that opens the lock contains repeats in the 3 number combinations
How many of the total possible three digit combinations include repeats? Answer by rothauserc(4718) (Show Source):
You can put this solution on YOUR website! With repeats there are 40 * 40 * 40 = 64000 combinations
Without repeats there are 40 * 39 * 38 = 59280
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There are 64000 - 59280 = 4720 combinations that include repeats
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