Mathematics, 09.01.2020 02:31, gaby4567

A“descending number” is a three-digit number, such that the units digit is less than the tens digits and the tens digit is less than the hundreds digit. what is the probability that a three-digit number chosen at random is a “descending number”?

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A“descending number” is a three-digit number, such that the units digit is less than the tens digits...