Gr 10 Math Ch 11: Theoretical Probability
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Questions and Answers

What value represents the probability of an event that is certain to occur?

  • 0.25
  • 0.5
  • 0.0
  • 1.0 (correct)

    • If the probability of an event is expressed as rac{3}{4}, what is its equivalent percentage?

  • 25%
  • 50%
  • 75% (correct)
  • 100%

    • Which of the following options correctly describes a probability of 0?

  • The event occurs half the time.
  • The event will never occur. (correct)
  • The event will almost always occur.
  • The event is impossible but may occur occasionally.

    • In a scenario where all outcomes are equally likely, how is the probability of an event calculated?

    <p>By finding the ratio of outcomes in the event set to possible outcomes.</p> Signup and view all the answers

    What does a probability of 0.5 signify in terms of event occurrence?

    <p>The event will occur half the time.</p> Signup and view all the answers

    What is the correct definition of probability?

    <p>A real number between 0 and 1 that describes how likely it is that an event will occur.</p> Signup and view all the answers

    Which of the following is NOT a valid way to express probability?

    <p>As a whole number.</p> Signup and view all the answers

    If the probability of an event is expressed as 0.2, what does this signify?

    <p>The event will occur one time out of five.</p> Signup and view all the answers

    What does a probability of 0 indicate about an event?

    <p>The event will never occur.</p> Signup and view all the answers

    In a scenario where all outcomes are equally likely, how can the probability of an event be computed?

    <p>By dividing the number of outcomes in the event set by the total number of possible outcomes.</p> Signup and view all the answers

    What can a probability value of 0.1 be interpreted as in a practical scenario?

    <p>There is a 10% chance the event will happen.</p> Signup and view all the answers

    Which of the following statements correctly describes theoretical probability?

    <p>Theoretical probability is determined by the ratio of favorable outcomes to total outcomes.</p> Signup and view all the answers

    If an event has a probability of rac{1}{2}, what conclusion can be drawn about this event?

    <p>The event is equally likely to occur or not occur.</p> Signup and view all the answers

    Which of these is NOT a valid statement regarding probabilities?

    <p>Probabilities can only be between 1 and 10.</p> Signup and view all the answers

    What does the formula P(E) = rac{n(E)}{n(S)} represent?

    <p>The ratio of favorable outcomes to possible outcomes.</p> Signup and view all the answers

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