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Math Help - Probabilities

  1. #1
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    Probabilities

    A survey revealed that 21.5% of the households had no checking account, 66.9% had regular checking accounts, and 11.6% had NOW accounts. Of those households with no checking account 40% had savings accounts. Of the households with regular checking accounts 71.6% had a savings account. Of the households with NOW accounts 79.3% had savings accounts.
    The probability that a randomly selected household has a savings account is:
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  2. #2
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    Quote Originally Posted by jax760 View Post
    a survey revealed that 21.5% of the households had no checking account, 66.9% had regular checking accounts, and 11.6% had now accounts. Of those households with no checking account 40% had savings accounts. Of the households with regular checking accounts 71.6% had a savings account. Of the households with now accounts 79.3% had savings accounts.
    the probability that a randomly selected household has a savings account is:
    (0.4)(0.215) + (0.716)(0.669) + (0.793)(0.116) = ....
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