Finding Probability Using Intersections and Unions Independent or Not

If A = {1, 2, 3, 4, 5, 6} and B = {1, 2, 3, 5, 7, 9} What is A U B?

• {1, 2, 3, 4, 5, 6, 7, 9}
• {1, 2, 3, 5}
• {4, 6, 7, 9}
• { }

If A = {1, 2, 3, 4, 5, 6} and B = {1, 2, 3, 5, 7, 9} What is A ⋂ B?

• {1, 2, 3, 4, 5, 6, 7, 9}
• {1, 2, 3, 5}
• {4, 6, 7, 9}
• { }

If Set A = MICHAEL and Set B = JORDAN, what is A ⋃ B?

• {MICHAELJORDAN}
• {MICHAELJORDN}
• {A}
• {  }

If Set A = MICHAEL and Set B = JORDAN, what is A⋂ B?

• {MICHAELJORDAN}

• {MICHAELJORDN}

• {A}

• { }

What statement does the shaded region represent?

• A or B
• Not A
• A and B
• Not B

What statement does the shaded region represent?

• A or B
• A and B
• A
• B

What is
P(Foreign language ∩ Sport)?

• 14/50
• 47/50
• 24/50
• 14/47

What is P(not sport)?

• 24/50
• 26/50
• 3/50
• 23/50

What is P(not Foreign Language)?

• 10/50
• 13/50
• 3/50
• 14/50

Suppose that A and B are events in a sample space with P(A) = 0.8 and P(B|A) = 0.5.  Then P(A and B) =

• 0.3
• 0.4
• 0.625
• 0.8