3.92 There are 15 girls and 16 boys in a class. A delegation of four has to be selected from among the students of this class. In how many ways can this be done so that the delegation includes: (a) only two girls b) at least two girls c) at most two girls?

3.92 There are 15 girls and 16 boys in a class. A delegation of four has to be selected from among the students of this class. In how many ways can this be done so that the delegation includes: (a) only two girls b) at least two girls c) at most two girls?

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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Question

3.92 There are 15 girls and 16 boys in a class. A delegation of four has to be selected from among the students of this class. In how many ways can this be done so that the delegation includes:
(a) only two girls
b) at least two girls
c) at most two girls?

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