Probability

Probability

Set Notation

•  $A\cup B$  ... union = or

•  $A\cap B$  ... intersection = and

• A'            ... complement = not

Multiple Choice

If X={blue, red, green, yellow, purple} and Y={pink, green, orange, blue, yellow}, what is 

 $X\cap Y$  ?

• {blue, red, green, yellow, purple, pink, green, orange, blue, yellow}

• {blue, yellow, green}

• {blue, red, green,  yellow, purple, pink, green, orange }

• {blue, green}

Multiple Choice

What notation describes the shaded yellow area?

• A'

• $A\cup B$

• $A\cap B$

• B'

Set Notation

•  $A\parallel B$  ... given (should only have 1 vertical line, not 2)

Multiple Choice

What is the probability of having dark hair given the fact that you have green eyes?

• 37/195

• 37/180

• 180/195

• 37/750

Independent vs. Dependent Events

independent: 2 events have no impact on one another

dependent: 2 events impact one another

Multiple Select

Which of the following are dependent events? Check all that apply.

• getting a haircut and then getting a manicure

• rolling a dice: getting a 2 and then a 3

• marbles in box: getting a blue, removing it, and then a red

• 52 card deck: getting 4 queens in a row without replacing

• bowling: getting a spare and then a strike

Multiple Choice

If A & B are independent, P(A)=0.4 and P(B)=0.12, what is the probability of

 $A\cap B$  ?

• 0.48

• 0.048

• 0.52

• 0.052