Set Theory and Probability

If A = {1, 3, 5, 7, 9} and B = {2, 3, 5, 7}, what is A ∩ B?

• {3, 5, 7}

• {2, 3, 5, 7}

• {2, 3, 5, 7, 9}

• {1, 2, 3, 5, 7, 9}

If A = {1, 3, 5, 7, 9} and B = {2, 3, 5, 7}, what is A ∪ B?

• {3, 5, 7}
• {2, 3, 5, 7}
• {2, 3, 5, 7, 9}
• {1, 2, 3, 5, 7, 9}

What statement does the shaded region represent

• A or B
• Not A
• A and B
• Not B

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

• Union

• Intersection

• Disjointed

• Subset

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

• Union
• Intersection
• Disjointed
• Subset

What type of set is denoted as either { } or ∅?

• Universal Set
• Empty (or Null) Set
• Disjointed Set
• Complement of a Set

Determine the number of people who participated in weight-training (W) and cardio (C).

• 15
• 54
• 69
• 75

How many senior boys play football and wrestle?

• 9
• 12
• 18
• 39

Left Pocket (L) = {pencils, erasers, pens}
Right Pocket (R) = {gloves, paper, coins, phone}
What is L ∪ R?

• ∅
• {pencils, erasers, pens}
• {gloves, paper, coins, phone}
• {pencils, erasers, pens, gloves, paper, coins, phone}

Left Pocket (L) = {pencils, erasers, pens}
Right Pocket (R) = {gloves, paper, coins, phone}
What is L ∩ R?

• ∅
• {pencils, erasers, pens}
• {gloves, paper, coins, phone}
• {pencils, erasers, pens, gloves, paper, coins, phone}