# Probabilities

• Jan 17th 2009, 06:00 PM
jax760
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:
• Jan 17th 2009, 07:09 PM
mr fantastic
Quote:

Originally Posted by jax760
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) = ....