A multiple choice exam has 10 choices for each question. A student has studied enough so that the probability he/she will know the answer to a question is 0.24, if he/she doesn't know the answer then the probability he/she will be able to eliminate one of the choices is 0.24, otherwise all 10 choices seem equally possible, and the student blindly guesses one out of all choices. If the student knows the answer he/she will get the question right, If not, they have to guess from the 9 or 10 choices depending on whether one choice is eliminated or not. What's the probability the students answer a question correctly? a. 0.3160 O b. 0.3187 c. 0.2667 O d. 0.2920 e. 0.4800

A multiple choice exam has 10 choices for each question. A student has studied enough so that the probability he/she will know the answer to a question is 0.24, if he/she doesn't know the answer then the probability he/she will be able to eliminate one of the choices is 0.24, otherwise all 10 choices seem equally possible, and the student blindly guesses one out of all choices. If the student knows the answer he/she will get the question right, If not, they have to guess from the 9 or 10 choices depending on whether one choice is eliminated or not. What's the probability the students answer a question correctly? a. 0.3160 O b. 0.3187 c. 0.2667 O d. 0.2920 e. 0.4800

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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

Contingency Table

A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.

Binomial Distribution

Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.

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