Expected Probability

You roll a standard die. You win $12 if you roll a six, $6 if you roll a one, and $0 if you roll anything else. What is the expected value of a single roll?

• $3

• $18

• $9

• $2

In a game you flip a coin twice, and record the

number of heads that occur. You get 10

points for 2 heads, zero points for 1 head, and

5 points for no heads. What is the expected

value for the number of points you'll win per turn?

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What is the probability of spinning a red if we spin 30 times?

• 1/5

• 1/30

• 3/30

• 1/10

If you choose from the following M & M colors, what is the probability that you choose blue? Tricky

5 green 6 yellow 8 blue 7 brown

• 8/26

• 4/13

• 8/25

• 1/3

What is the probability of selecting an orange candy?

• 0%

• 25%

• 50%

• 100%

Theoretically, what is the probability of rolling a sum of one with a pair of dice?

• 0

• 1/6

• 1/12

• 1/36

• Yes, because all of the probabilities are between 0 and 1 inclusive and the sum of all the probabilities is 1.
• No, all probabilities are not be between 0 and 1 inclusive
• No, the sum of all the probabilities is not 1.
• Yes, because the distribution is symmetric

What is the probability of selecting a brown candy?

• 2/18

• 1/9

• 1/10

Theoretical P(King)

• 2/8

• 1/8

• 3/8

• 1/4

There are 6 boys and 8 girls in a classroom. What is the probability that the teacher randomly selects a boy?

• ⁸/₆

• ⁶/₈

• 3/7

• ⁸/₁₄