Question

Your supervisor assigns you 5 evenings out of 7 possibilities. What is the probability that you will not be assigned weekends?

Answers

  1. The probability that you will not be assigned weekends is 4/49
    For given question,
    A supervisor assigns you 5 evenings out of 7 possibilities.
    so, you will not be assigned 2 evenings out of  7 possibilities.
    Let event A:  you will not be assigned on Saturday
    event B:  you will not be assigned on Sunday
    Using probability formula,
    The probability that you will not be assigned on Saturday = 2/7
    ⇒ P(A) = 2/7
    Similarly using probability formula,
    the probability that you will not be assigned on Sunday = 2/7
    ⇒ P(B) = 2/7
    We need to find the probability that you will not be assigned weekends.
    P(A∩B) will represent the probability that  you will not be assigned on both days (weekends)
    P(A ∩ B) = P(A) × P(B)
    Substituting values,
    ⇒ P(A ∩ B) = 2/7 × 2/7
    ⇒ P(A ∩ B) = 4/49
    Therefore, the probability that you will not be assigned weekends is 4/49
    Learn more about the probability here:
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