A study of 204 advertising firms revealed their income after taxes:

Income after Taxes	Number of Firms
Under $1 million		88
$1 million to $20 million		52
$20 million or more		64

1. What is the probability an advertising firm selected at random has under $1 million in income after taxes? (Round your answer to 2 decimal places.)

1. b-1. What is the probability an advertising firm selected at random has either an income between $1 million and $20 million, or an income of $20 million or more? (Round your answer to 2 decimal places.)

1. b-2. What rule of probability was applied?

• Rule of complements only

• Special rule of addition only

• Either