A class contains 9 boys and 3 girls. (a) In how many ways can the teacher choose a committee of 4? (b) How many of them will contain atleast one girl? (c) How many of them will contain exactly one girl?

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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15 A class contains 9 boys and 3 girls.
(a) In how many ways can the teacher choose a committee of 4?
(b) How many of them will contain atleast one girl?
(c) How many of them will contain exactly one girl?
Transcribed Image Text:15 A class contains 9 boys and 3 girls. (a) In how many ways can the teacher choose a committee of 4? (b) How many of them will contain atleast one girl? (c) How many of them will contain exactly one girl?
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