Chapter 6 - AP Stats - Probability

Identify the shaded area...

• A∩B

• A∪B

• A'∩B'

• A'∪B'

Given the probabilities P(A) =0.4 and P(A∪B) =0.6, what is the probability P(B): If A and B are mutually exclusive? If A and B are independent?

• 0.2; 0.4

• 0.2; 0.33

• 0.33; 0.2

• 0.6; 0.33

P(Freshman or Pizza):

• 27/50

• 4/50

• 3/50

• 30/50

P(Sandals|Pants):

• 4/20

• 6/15

• 1/2

• 2/7

Suppose that A and B are two independent events with P(A) = .2 and P(B) = .4. 
P(A∩B^C) is

• .08

• .12

• .52

• .60

Identify the shaded area...

• A

• B

• A'

• B'

Identify the shaded area...

• A∩B

• A∪B

• A'∩B'

• A'∪B'

If two events are mutually exclusive, the probability that they both occur is

• 1

• 0

• 0.5

• impossible to determine

Suppose A and B are events with the given probabilities:  P(A) = 0.62, P(B) = 0.44, and P(A and B) = 0.31.  Which of the following conclusions can be drawn from the data?

• P(A or B) = 0.75

• A and B are mutually exclusive events

• A and B are independent events

• P(A|B) cannot be determined from the given information

An assignment of probability must obey which of the following?

• The probability of any event must be a number between 0 and 1, inclusive.

• The sum of all the probabilities of all outcomes in the sample space must be exactly 1.

• The probability of an event is the sum of the outcomes in the sample space which make up the event.

• All of these reasons