In a certain batch of 20 valves, two are known to be faulty. A sample of four valves is chosen at random and drawn together, in one draw, from the batch, determine: (a) The probability that none of the valves in the sample is faulty, correct to 3 s.f. 7 (b) The probability that at least one valve in the sample is faulty, correct to 3 s.f.
In a certain batch of 20 valves, two are known to be faulty. A sample of four valves is chosen at random and drawn together, in one draw, from the batch, determine: (a) The probability that none of the valves in the sample is faulty, correct to 3 s.f. 7 (b) The probability that at least one valve in the sample is faulty, correct to 3 s.f.
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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In a certain batch of 20 valves, two are known to be faulty. A sample of four valves is chosen at random and drawn together, in one draw, from the batch, determine:
(a) The probability that none of the valves in the sample is faulty, correct to 3 s.f. 7
(b) The probability that at least one valve in the sample is faulty, correct to 3 s.f.
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