Basic Counting Rules Probability

The probability that a randomly chosen American is a Republican is 0.35. What is the probability that a randomly chosen American is not Republican?

• 0.35

• 0.65

• 0.75

• 0.50

What is the probability of getting any letter that is not A?

• 6/8

• 3/4

• 2/8

• 1/4

If Mrs. Mack polls the class and asks, "What is your favorite pizza topping?" Suppose that the responses include: 10% cheese; 30% pepperoni; 25% sausage; 5% ham. What is the probability that a student responded "pepperoni" or "sausage"?

• 30%

• 25%

• 55%

• This cannot be calculated.

You pick a marble from this bag.
What is the probability you will choose either a black or white marble?

• 3/5

• 9/100

• 1/10

• 2/5

A bag contains 9 green marbles, 5 yellow marbles and 6 red marbles.  You choose one marble.   What is the probability of selecting a green or red marble?

• 8/15

• 6/11

• 3/4

• 2/3

You flip a nickel three times.

Find the probability that all flips will land on tails.

• 1/2

• 1/4

• 1/6

• 1/8

If you draw one card from a standard deck, what is the probability of drawing a spade or a red card?

• 13/52

• 26/52

• 39/52

• Not possible

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

Dice have six faces, showing 1 to 6 pips (spots). If a die is balanced, all six faces are equally likely. What must be the probability of each face?

• 1/10, or 0.10.

• 1/6, or 0.167.

• 2/10, or 0.20.

• could be any number between 0 and 1.

If a coin has 0.6 probability coming up tails, the probability that it comes up heads is

• 0.5 

• -0.2 

• 0.4

• 0.6