Conditional Probabilities

Conditional Probability

By Kiffany Cody

https://youtu.be/jHnLUbOyPEE​

​Get ready to draw a 2-way table an solve this problem.

Multiple Choice

How many children prefer vanilla ice cream?

• 78

• 131

• 26

• 105

Multiple Choice

How many total people were surveyed?

• 224

• 448

• 131

• 146

Multiple Choice

What is the probability that a female is chose given they like a Toyota? 

• .525
• .4627
• .6774
• .3143

Multiple Choice

P(Pizza|Senior):

• 10/15
• 4/5
• 2/3
• 10/5

Multiple Choice

Consider the following table with information about all of the students taking Statistics at Happy High School.

P( Male | Full-time)

• 28/71

• 3/7

• 12/71

• 3/10

Multiple Choice

• .2855
• .6246
• .0922
• .3230

Multiple Choice

What is the probability that a student does not play on a sports team? 

• .5
• .45
• .55

Multiple Choice

What is the probability that a student does play a sport given they do not play an instrument? 

• .2
• .2222
• .10
• .5

Multiple Choice

What is the probability that they speak French given they are a girl? 

• 2.14
• .24
• .4
• .8571

Multiple Choice

P(Sandals|Pants):

• 4/20
• 6/15
• 1/2
• 2/7

Multiple Choice

A science teacher gave her class two tests. 25% of the class passed both tests and 42% of the class passed the first test. What percent of those who passed the first test also passed the second?

• 59.5%

• 10.5%

• 1.6%

• Not enough information