A drum contains 4 black balls, 5 red balls and 6 green balls. If 5 balls are selected at random, find the probability that the sample contains a. No red ball b. Exactly 1 black ball c. Exactly 1 red ball and exactly 2 green balls

A drum contains 4 black balls, 5 red balls and 6 green balls. If 5 balls are selected at random, find the probability that the sample contains a. No red ball b. Exactly 1 black ball c. Exactly 1 red ball and exactly 2 green balls

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

A drum contains 4 black balls, 5 red balls and 6 green balls. If 5 balls are selected at random, find the probability that the sample contains

a. No red ball

b. Exactly 1 black ball

c. Exactly 1 red ball and exactly 2 green balls

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