Combined Probability

If you roll one die, what is the probability of getting an even number or a multiple of 3?

• 1/3

• 2/3

• 1/2

• 1/6

find the probability of choosing a student at random that plays an instrument OR a sport

• 1/2

• 13/20

• 21/20

• 4/5

The table above displays the 100 senators of the 112th U.S Congress on January 5, 2011, classified by political party affiliation and gender. A senator is selected at random from this group. Compute the following probability: The senator is a Democrat or a female.

• .42

• .56

• .47

• .53

A jar contains 4 white chips, 5 purple chips, and 1 black chip. Chips are selected randomly one at a time, and are not replaced.
P(white, then purple, then black)

• 1/36

• 2/39

• 5/41

• 6/43

Find P(No Food OR No Drink)

Mathematical Equivalence

ON

Given 𝑃(𝐴)=0.4, 𝑃(𝐵)=0.26 and 𝑃(𝐴 or 𝐵)=0.436, find the value of 𝑃(𝐴 and 𝐵), rounding to the nearest thousandth, if necessary.

Mathematical Equivalence

ON

A box contains 5 purple marbles, 3 green marbles and 2 orange marbles. Draws are made without replacement.P(both marbles are purple)

• 2/9

• 1/3

• 1/2

• 1/4

A farm has 5 brown cows and 10 white cows. A fence is open and two cows escape. What is the probability that it will be a brown cow, then a white cow?

• 1/9

• 2/9

• 5/21

• 10/21

You flip a nickel three times.
Find the probability that all flips will land on tails.

• 1/2

• 1/4

• 1/6

• 1/8

• 43/200

• 35/200

• 105/200

• None of the above