Basic Probability

What is the probability of spinning green or blue (assuming each slice/section is equal in size)?

• 0

• 5/12

• 1/2

• 3/4

Find the probability of NOT rolling a 2 on a single fair 6-sided die.

• 1/6

• 2/6

• 5/6

• 2

If you randomly pick from the following M & M colors from a bag, what is the probability that you choose blue?

• 8/26 or 4/13

• 7/26

• 8/25

• 1/3

Is this probability assignment possible?

• YES! Because all probabilities add up to 1!

• NO! Because it doesn't have enough probabilities.

• NO! Because the probabilities do not add up to 1.

• NO! Because I cannot get a grade of 0, 1, 2, 3, or 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 percent of the class have another opinion?

• 20%

• 30%

• 35%

• This cannot be calculated.

How many outcomes are in the sample space for tossing one coin?

• 1

• 2

• 4

• 8

Which one is the sample space for flipping 3 coins?

• {H, T}

• {H1, H2, H3, T1, T2, T3}

• {HHH, TTT, HTH, THT, TTH, HHT}

• {HHH, TTT, HTH, THT, TTH, HHT, HTT, THH}

You give the answer to a probability problem as 6/5. The teacher marks it wrong. Why?

• It should have been 5/6.

• Its not written as a percent.

• Its more than 1.

• Its not written as a decimal.

Which of these cannot be considered a probability of an outcome?

• 1/3

• -1/5

• 0.80

• 112%

• 1

Roll a die one time. Find P(rolling a 4).

• 1/4

• 2/3

• 1/6

• 1/2