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4 years ago

8

You pick 3 digits (0-9) at random without replacement, and write them in the order picked. what is the probability that you have

written the first 3 digits of your phone number? assume there are no repeats of digits in your phone number.

1 answer:

Gre4nikov [31]4 years ago

6 0

There are 10*9*8 = 720 possibilities and only one case that would be the 3 digits of the phone number:

P = 1/720

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