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andre [41]
3 years ago
12

The first three digits of a university phone exchange are 452. If all the sequences of the remaining four digits are equally lik

ely, what is the probability that a randomly selected university phone number contains seven distinct digits?
Social Studies
1 answer:
igomit [66]3 years ago
4 0
7x6x5x4/10! = 1/4320
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