d) A professor uses two proofreaders Ali and Hana to check a certain manuscript. Ali misses 13% of typographical errors and Hana misses 9%. Assume that the proofreaders work independently. i. What is the probability that a randomly chosen typographical eror will be missed by both proofreaders? i. If the manuscript contains 2000 typographical errors, what number can be expected to be missed?

d) A professor uses two proofreaders Ali and Hana to check a certain manuscript. Ali misses 13% of typographical errors and Hana misses 9%. Assume that the proofreaders work independently. i. What is the probability that a randomly chosen typographical eror will be missed by both proofreaders? i. If the manuscript contains 2000 typographical errors, what number can be expected to be missed?

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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Concept explainers

Counting Principles

In statistics, the counting principle can be said to be the concept in which the quantity of an item is determined. There can be a single item, or a group of items, or items that are related to each other. In every possible set of items, the quantity of the possible item groups or their sorting measures can be determined with counting principles.

Question

d) A professor uses two proofreaders Ali and Hana to check a certain manuscript. Ali
misses 13% of typographical errors and Hana misses 9%. Assume that the proofreaders
work independently.
i.
What is the probability that a randomly chosen typographical error will be
missed by both proofreaders?
If the manuscript contains 2000 typographical errors, what number can be
ii.
expected to be missed?

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