How many permutations

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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How many permutations of the digits 12345678 contain the numbers 23 and 567 in correct order?

  1

7!

  2

6!

  3

5!

  4

8!

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