Basic Probability

Determine the probability of the following even occuring: You flip a fair coin and the coin will land heads up.

• 0

• 1/4

• 1/2

• 1

What is the probability of spinning the fair 8-sided spinner and landing on the 7?

• impossible - 0 / 8

• 1 / 2

• 1 / 8

• 7 / 8

What is the probability of spinning a fair 6-sided spinner and landing on an odd number?

• 1 / 2

• 5 / 6

• 6 / 6 or 1

• 0 / 6

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

• 1/6

• 2/6

• 5/6

• 2

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 there is a 40% chance for rain, then there is a 60% chance that it will not rain. What rule in probability does the 60% conclusion represent?

• Probability Assignment Rule

• Disjoint Rule

• Subtraction Rule

• Complement Rule

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.

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}

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

• 1

• 2

• 4

• 8

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.