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First Calculator F- faulty NF = not faulty F NF Second Calculator P q F NF (d) The whole batch of calculators is rejected - NF Third Calculator either if the first two chosen are both faulty or The tree diagram shows a testing procedure on calculators, taken from a large batch. NF 1 Each time a calculator is chosen at randor, the probability that it is faulty (F) is 20 if a third one needs to be chosen and it is faulty. Calculate the probability that the whole hatch is rejected. F (e) In one month, 1000 batches of calculators are tested in this way. How many batches are expected to be rejected? NF

First Calculator F- faulty NF = not faulty F NF Second Calculator P q F NF (d) The whole batch of calculators is rejected - NF Third Calculator either if the first two chosen are both faulty or The tree diagram shows a testing procedure on calculators, taken from a large batch. NF 1 Each time a calculator is chosen at randor, the probability that it is faulty (F) is 20 if a third one needs to be chosen and it is faulty. Calculate the probability that the whole hatch is rejected. F (e) In one month, 1000 batches of calculators are tested in this way. How many batches are expected to be rejected? NF

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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First Sccond Third Calculator Calculator Calculator F NF NF F NF NF NF F- faulty NF = not faulty The tree diagram shows a testing procedure on calculators, taken from a large hatch. 1 Each time a calculator is chosen at randorn, the probability that it is faulty (F) is 20 (d) The whole batch of calculators is rejected either if the first two chosen are both faulty if a third one needs to be chosen and it is faulty. or Calculate the probability that the whole batch is rejected. (e) In one month, 1000 batches of calculators are tested in this way. How many batches are expected to be rejected?
Transcribed Image Text:First Sccond Third Calculator Calculator Calculator F NF NF F NF NF NF F- faulty NF = not faulty The tree diagram shows a testing procedure on calculators, taken from a large hatch. 1 Each time a calculator is chosen at randorn, the probability that it is faulty (F) is 20 (d) The whole batch of calculators is rejected either if the first two chosen are both faulty if a third one needs to be chosen and it is faulty. or Calculate the probability that the whole batch is rejected. (e) In one month, 1000 batches of calculators are tested in this way. How many batches are expected to be rejected?
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