1 to 15 inclusive is written on one card

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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each of the natural numbers from 1 to 15 inclusive is written on one card, and different numbers are written on the different cards. We randomly select four cards. What is the probability that the smallest number of selected cards is 8 or the largest of them is 12?

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