4. The probability of an examinee passing the board exam is 0.6. Find the probability of passing the board exam before his third attempt.
4. The probability of an examinee passing the board exam is 0.6. Find the probability of passing the board exam before his third attempt.
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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Transcribed Image Text:4. The probability of an examinee passing the board exam is
0.6. Find the probability of passing the board exam before his
third attempt.
5. A shipment of 50 items contains 3 defective items. What is
the probability that a random selected 3 items from the
shipment contains less than 2 defective items?
9. A box contains 5 RED balls and 4 GREEN balls. Two balls is selected from the box. Find the probability that:
a green ball is obtained on the second draw given that the first
ball drawn is RED. (No replacement balls is made before the
second draw is made)
b balls of different colors are drawn. (Replacement of ball
drawn is made before the second draw is made)
10. In a high school graduating class of 100 students, 54 studied math, 69 studied history, and 35 studied both math and history. If
one of these students is selected at random, find the probability that
(a) the student took mathematics or history;
(b) the student did not take either of these subjects;
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