Basic Probability

Basic Probability

Multiple Choice

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

• 1

• 2

• 4

• 8

Multiple Select

Which of the following are possible samples spaces for tossing 2 coins? (May be more than one correct answer)

• {H, T, H, T}

• {H, T}

• {TT, HH, TH, HT}

• {HH, HT, TH, TT}

• {T, H}

Multiple Choice

Slips of paper marked with the numbers 1, 2, 3, 4, and 5 are placed in a box. After mixing, two slips are drawn. How many possible outcomes are there?

• 5

• 10

• 15

• 25

Poll

Did you understand the last question? Or how we got the answer?

• I understood and knew

• I did not understand, but guessed

• I did not understand and did not get it right

Multiple Choice

An unprepared student takes a 3-question true/false quiz in which he guesses the answers to all 3 questions. What is the probability he gets all 3 correct?

• 1/2

• 1/3

• 1/6

• 1/8

Open Ended

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

Multiple Select

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

• 1/3

• -1/5

• 0.8

• 112%

• 1

Fill in the Blanks

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

Multiple Choice

Roll a die one time. Find P(even number).

• 1/2

• 1/3

• 1/6

• 2/3

Fill in the Blanks

Roll a die one time. Find P(a number less than 7).

Multiple Choice

In his Halloween bag, Jack got 3 Twix, 8 Snickers, 5 Lollipops, and 4 Reese’s. Jack pulls candy out of his bag at random. What is the probability of Jack pulling out a Twix or a Snickers on one try?

• 11/20

• 3/20

• 3/11

• 3/8

Fill in the Blanks

A bag contains 5 quarters, 2 dimes, and 4 pennies. What is the probability of picking a quarter?

Multiple Choice

A jar contains 2 pink, 6 red, and 4 blue marbles. If you pick one marble without looking, what is the probability that the marble you pick will be red or blue?

• 5/6

• 1/2

• 1/3

• 1/6

Multiple Choice

Rolling a 15 on a number cube (6-sided dice) is 

• Certain

• Unlikely

• Impossible

• Even Chance

Fill in the Blanks

The probability of it raining today is 30%.  What is the probability that it will NOT rain?

Multiple Choice

What is the probability that you choose blue?

simplify!!!!!!!

5 green

6 yellow

8 blue

7 brown

• 8/26

• 4/13

• 8/25

• 1/3

Fill in the Blanks

The letters that form the word ALGEBRA are placed in a bowl. What is the probability of choosing a letter other than “A”? 

Multiple Choice

Probability can be expressed as a number between_____ and _____.

• 0 and 100

• 0 and 10

• 0 and 1

• -1 and 1

Multiple Choice

Probability can be written as ...

• a fraction

• a decimal

• a percent

• all of the above

Fill in the Blanks

What is the probability of rolling a sum of 15 with a pair of six-sided dice?

Fill in the Blanks

A store sells shirts that are either small, medium, or large. The colors are either red, blue, green, or white. What is the probability someone will select a large green shirt?

Fill in the Blanks

In a drawer, there are 6 white socks, 4 black socks, and 2 brown socks. You pick out a sock, replace it, then pick out a 2nd sock. What is the probability that you will pick a brown, AND then black sock?

Multiple Choice

AND means you need to...

• Multiply

• Add

Multiple Choice

OR means you need to...

• Multiply

• Add

Open Ended

What did you understand about probability?

Open Ended

What about probability do you still wonder?

Open Ended

Give me 3 real world examples of where probability is used!