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Studies have shown a particular television commercial is understood by 25% of first grade students and 80% of fourth grade students. If a television advertising agency randomly selects one first grader and one fourth grader, what is the probability neither child would understand the commercial, assuming the children's reactions are independent?

  • math - ,

    The probability that both/all events would occur is found by multiplying the probabilities of the individual events.

    (1-.25)(1-.80) = ?

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    Is 2,340 divisible by 90? How do you know?

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    5464

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