An exam consists of 25 multiple-choice questions and each question is worth 1 point. 10 of these questions each present 5 answer options to choose from, only one of which is the correct answer. 6 other questions each present 3 answer options to choose from, only one of which is the correct answer. Of the remaining questions, each present 2 answer options to choose from, only one of which is the correct answer.

An exam consists of 25 multiple-choice questions and each question is worth 1 point. 10 of these questions each present 5 answer options to choose from, only one of which is the correct answer. 6 other questions each present 3 answer options to choose from, only one of which is the correct answer. Of the remaining questions, each present 2 answer options to choose from, only one of which is the correct answer.

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

An exam consists of 25 multiple-choice questions and each question is worth 1 point.

10 of these questions each present 5 answer options to choose from, only one of which is the correct answer.

6 other questions each present 3 answer options to choose from, only one of which is the correct answer.

Of the remaining questions, each present 2 answer options to choose from, only one of which is the correct answer.

How many correct answers would be expected if the exam were taken by an unprepared student who picked at random from among the answer options on every question?

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