First Third Second Calculator Calculator Calculator F F F NF NF NF NF NF = faulty not foulty

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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4.
Second
Calculator
Third
Calculator
First
Calculator
20
F
F
F
NF
NF
F
-F
NF
19
20
NF
NF
F = faulty
NF = not faulty
20
The tree diagram shows a testing procedure on calculators, taken from a large batch.
Each time a calculator is chosen at random, the probability that it is faulty (F)
1
20
If exactly one out of two calculators tested is faulty, then a third calculator is chosen at random.
Calculate the probability that exactly one of the first two calculators is faulty and the third one
is faulty.
Transcribed Image Text:4. Second Calculator Third Calculator First Calculator 20 F F F NF NF F -F NF 19 20 NF NF F = faulty NF = not faulty 20 The tree diagram shows a testing procedure on calculators, taken from a large batch. Each time a calculator is chosen at random, the probability that it is faulty (F) 1 20 If exactly one out of two calculators tested is faulty, then a third calculator is chosen at random. Calculate the probability that exactly one of the first two calculators is faulty and the third one is faulty.
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