Math Problem Statement

A test is given to a group of students; the grades and gender of the students is summarized in the table below:

Cont Table 3.PNG

If one student is chosen at random, determine the following probabilities. Write your answer as fractions.

a) P(student is female) =

b) P(student got an “A”) =

c) P(student is female and got an “A”) =

d) P(student got a "A" given that the student is female) =

e) P(student is female given that the student got an "A") =

Solution

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Math Problem Analysis

Mathematical Concepts

Probability
Conditional Probability
Basic Fractions

Formulas

P(A) = Number of favorable outcomes / Total outcomes
P(A and B) = P(A) * P(B)
P(A|B) = P(A and B) / P(B)

Theorems

Law of Total Probability
Bayes' Theorem

Suitable Grade Level

Grades 9-12