Geometric Probability & Expected Value
Authored by Ju young Kim
Mathematics
9th - 12th Grade
CCSS covered
Used 5+ times
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14 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
If the expected value is negative, are you expected to win?
Tags
CCSS.HSS.MD.A.2
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
A coin is flipped 3 times. If you get tails once you get $5, tails twice you get $15, and tails on all three flips you get $40. What is the expected amount of money you will get?
$12.50
$11.25
$7.50
$10
Tags
CCSS.HSS.MD.A.2
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Eva flips a coin. If she gets heads, she wins $4. If she gets tails, she loses $3. What is her expected value of a coin flip?
$1
$0.50
-$0.50
$0
Tags
CCSS.HSS.MD.B.5A
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Suppose you buy a ticket for $6 out of a lottery of 1000 tickets where the prize for the one winning is to be $800. How much money do you take home (after paying for it)?
$800
-$6.50
-$6
-$5.20
Tags
CCSS.HSS.MD.B.5A
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
A student group sells 500 raffle tickets for $2 each. At the drawing the top prize will be a gift certificate for $100. Second prize will be a $50 gift card and there will be five 3rd prizes, each a $20 gift card. Do you expect to win or lose (on average)? How much?
lose an average of $5.50
lose an average of $1.50
win an average of $2.00
lose an average of $10.00
Tags
CCSS.HSS.MD.B.5A
6.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
A stockbroker estimates that at the end of the year, there is a 40% chance a stock will be worth $50, a 35% chance it will be worth $60 and a 25% chance it will be worth $70.
What expected value does this broker assign to this stock's end-of-the-year price?
Tags
CCSS.HSS.MD.A.2
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Given the probability model in the table below, what is the expected value of the random variable?
X 50 20 5
P(X) 0.1 0.3 0.6
Tags
CCSS.HSS.MD.A.2
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