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A combination lock on a suitcase has 3 wheels, each labelled with nine digits from 1 to 9. If an opening combination is a particular sequence of three digits with no repeats, what is the probability of a person guessing the right combination ? Select the correct answer from above options

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Correct Answer - 1 504 Let us fill 3 places with different digits from 1 to 9. Total number of ways =(9×8×7)=504 . Thus, we have in all 504 combinations. P(choosing one opening combination) = 1 504 .

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