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15. A such that te balls, and 4 black balls. In how many ways can we select 4 balls e. exactly 2 are black? f. exactly 1 is black? none is blue?

15. A such that te balls, and 4 black balls. In how many ways can we select 4 balls e. exactly 2 are black? f. exactly 1 is black? none is blue?

A First Course in Probability (10th Edition)
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 box contains 8 blue balls, 6 white balls, and 4 black balls. In how many ways can we select 4 balls such that e. exactly 2 are black? f. exactly 1 is black? g. none is blue?
Transcribed Image Text:15. A box contains 8 blue balls, 6 white balls, and 4 black balls. In how many ways can we select 4 balls such that e. exactly 2 are black? f. exactly 1 is black? g. none is blue?
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