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 with a savings account has no checking account is: