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a jar contains 20 white marbles, 30 red marbles and 15 green marbles. 4. Draw one marble at random. What is the probability that the marble is red? 6 6. (a) 구 (b) 13 3 (c) 13 4 (d) 13

a jar contains 20 white marbles, 30 red marbles and 15 green marbles. 4. Draw one marble at random. What is the probability that the marble is red? 6 6. (a) 구 (b) 13 3 (c) 13 4 (d) 13

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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a jar contains 20 white marbles, 30 red marbles and 15 green marbles. 4. Draw one marble at random. What is the probability that the marble is red? 6 (a) 7 (b) 13 3 (c) 13 4 (d) 13 5. Suppose you draw one marble and notice that it is green. Without replacing the first marble, draw a second marble. What is the probability that the second marble is red? 15 (a) 13 (b) 32 18 45 (c) 169 (d) 416 6. Draw two marbles at random. What is the probability that both are green? 21 21 (a) 416 (b) 832 9 10 (c) 169 (d) 13 7. Draw two marbles at random. What is the probability that one is red and one is green? 45 9 (a) 208 (b) 13 18 45 (c) 169 (d) 104
Transcribed Image Text:a jar contains 20 white marbles, 30 red marbles and 15 green marbles. 4. Draw one marble at random. What is the probability that the marble is red? 6 (a) 7 (b) 13 3 (c) 13 4 (d) 13 5. Suppose you draw one marble and notice that it is green. Without replacing the first marble, draw a second marble. What is the probability that the second marble is red? 15 (a) 13 (b) 32 18 45 (c) 169 (d) 416 6. Draw two marbles at random. What is the probability that both are green? 21 21 (a) 416 (b) 832 9 10 (c) 169 (d) 13 7. Draw two marbles at random. What is the probability that one is red and one is green? 45 9 (a) 208 (b) 13 18 45 (c) 169 (d) 104
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