Lesson: Conditional Probability: Two-Way Tables
In this lesson, we will learn how to deal with the concept of conditional probability using joint frequencies presented in two-way tables.
Sample Question Videos
Worksheet: 7 Questions • 2 Videos
The two-way table shows the ages and activity choices of a group of participants at a summer camp.
|14 and Under||15||24||8|
A child is selected at random. Given that they chose rappelling, find the probability that the child is over 14.
In a group of 96 people, 34 out of the 71 women have a smartphone, and 18 men do not have a smartphone. Determine the probability that a randomly picked smartphone owner in this group will be female.
A bag contains 4 red balls and 3 blue balls. I take one at random, note its color, and put it on a shelf. I then take another ball at random, note its color, and put it on the shelf next to the first ball. The figure below shows the probability tree associated with this problem. Are the events of “getting a blue ball on the first draw” and “getting a red ball on the second draw” independent?