12.1-12.3 Additional practice

What number should go in the blue box?

• 21

• 135

• 19

• 22

How many total people were surveyed?

• 78

• 22

• 70

• 100

In a class of 25 students, 80% of students maintain an A average. How many students don't have an A average?

• 0 Students
• -3 Students
• 15 Students
• 5 Students

Of the mechanical engineers, what is the probability that math is their favorite subject?

• 1.91
• 52%
• 17%
• 35%

How many senior boys play football and wrestle?

• 9
• 12
• 18
• 39

How many senior boys play football but do not wrestle?

• 9
• 12
• 18
• 104

What situation does this picture represent?

• A U B

• (A U B)'

• A'

• B'

According to the Venn diagram, how many students do not snowboard?

• 21
• 22
• 28
• 29

The tree diagram shows the outcomes of rolling a die and flipping a coin.  
What is the probability of rolling an even number and flipping a head?

• ³/₁₂
• ¹/₂
• ⁴/₁₂
• ⁰/₁₂

What does this symbol ( ∪ ) represent in set theory?

• Union

• Intersection

• Disjointed

• Subset