5.1 Expected Value

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1. A tetrahedron has four equal triangular faces. The faces of a tetrahedral die are labelled with the numbers one, three, five, and seven. What is the expected value of the random variable representing the number observed on a single roll of this die?
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Expected Value Quizzes & Trivia

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2. What is the expected value of the random variable representing the number observed on a single roll of a six-sided die?
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3. The following table is a valid probability distribution for a random variable X. What must be the value for P(2) to complete the table?
X P(X)
0 0.1
1 0.3
2  
3 0.2
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4. When we compare the possible values for a discrete random variable to its expected value, the following statement must be true.
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5. A customer randomly selects three RAM modules from a shipment of seven known to contain two defective modules. What is the probability that the customer chooses exactly one defective module? Leave your answer as a fraction in lowest terms.
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A tetrahedron has four equal triangular faces. The faces of a...
What is the expected value of the random variable representing the...
The following table is a valid probability distribution for a random...
When we compare the possible values for a discrete random variable to...
A customer randomly selects three RAM modules from a shipment of seven...
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