Mathematics

11th -

12thgrade

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Probability Practice

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15 questions

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  • 1. Multiple Choice
    3 minutes
    1 pt
    You read in a book on poker that the probability of being dealt three of a kind in a five-card poker hand is 1/50. What does this mean?
    If you dealt thousands of poker hands, the fraction of them that contain three of a kind will be very close to 1/50.
    If you deal 50 poker hands, then one of them will contain  three of a kind.
    If you deal 10,000 poker hands, then 200 of them will contain three of a kind.
    A probability of 0.02 is somebody's best guess for a probability of being dealt three of a kind.
  • 2. Multiple Choice
    3 minutes
    1 pt
    People with type O-negative blood are universal donors. That is, any patient can receive a transfusion of O-negative blood. Only 7.2% of the American population has O-negative blood. If 10 people appear at random to give blood, what is the probability that at least 1 of them is a universal donor?
    0.526
    0.72
    0.28
    0
  • 3. Multiple Choice
    3 minutes
    1 pt
    According to one poll, only 8% of the public say they "trust Congress." In a simple random sample of 10 people, what is the probability that at least one person "trusts Congress?"
    0.188
    0.378
    0.434
    0.566
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