SOLUTION: what percent of all 3 digit codes have at least one repetition. examples: 544, 333, 252

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Question 929945: what percent of all 3 digit codes have at least one repetition. examples: 544, 333, 252
Answer by ewatrrr(24785) About Me  (Show Source):
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100% - 100%28%2810%2A9%2A8%29%2F%28+10%2A10%2A10%29%29 = 100% - 72% = 28%