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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