Simple Event Probability, Complement and Two-Way Tables

Find P(tails | rolling a 3)

Answer explanation

$\frac{P\left(A\ and\ B\right)}{P\left(B\right)}$

Find P(M&M | kid)

Answer explanation

 $\frac{P\left(A\ and\ B\right)}{P\left(B\right)}$  

P(Pizza Given Senior):

• 10/15

• 4/5

• 2/3

• 10/5

What is the probability that a student does not participate in a club given that they take sign language?

What is the probability that a student plays sports given that they do community service?

What percent of people who bought no food purchased water?

• 14.3%

• 33.3%

• 5%

• 41.1%

The two-way table above gives information about the grades for the semester in Mrs. Hardcase’s English class.

Given that the grade is an A, what is the probability of the student being female?

• 8/20

• 12/20

• 8/44

• 12/56

The question “Do you play soccer?” was asked of 110 students. Results are shown in the table.

Given a student is female, what is the probability the student plays soccer?

• 12/54

• 42/54

• 12/35

• 42/75

Of the times when the forecast called for rain, what is the percentage that it actually rained?

• About 90%

• About 50%

• About 70%

• About 80%

P(not A) = 
*Remember to simplify.*

• 6/8

• 3/4

• 2/8

• 1/4