
6.1 Expected value
Quiz
•
Mathematics
•
10th Grade
•
Hard
+1
Standards-aligned
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14 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 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
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
3.
MULTIPLE CHOICE QUESTION
5 mins • 12 pts
In a certain community, 30% of households have 1 child, 43% have 2 children, and 27% have 3 children. If a household is selected at random, what is the expected number of children in that household?
2.00
2.13
1.97
1.27
Tags
CCSS.HSS.MD.A.2
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
If the expected value is positive, are you expected to win?
Tags
CCSS.HSS.MD.B.5B
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Expected value is
an average.
a predicted value of a game.
the sum of the values multiplied by their probabilities.
all of the above.
Tags
CCSS.HSS.MD.A.2
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Find the mean (expected value) of the probability distribution.
85
83.2
87.1
84.4
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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