A marching band consists of 11 pipers and 12 drummers. Three of them are selected to march in order in a scaled-down socially-distanced New Year parade. How many different posssibilities are there if the selected trio must include at least one piper?

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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A marching band consists of 11 pipers and 12 drummers. Three of them are selected to march in order in a scaled-down socially-distanced New Year parade. How many different posssibilities are there if the selected trio must include at least one piper?

our answersheet says the answer is 9306???

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