Discussion:
Q: A study of 200 grocery chains revealed these incomes after taxes.
incomes after taxes num of firms
under $1million 102
$1 million to 20 million 61
$20 million or more 37
a. What is the probability a particular chain has under $1 million in income after taxes?
b. What is the probability a grocery chain selected at random has either an income between $1 million and $20 million, or an income of $20 million or more? what rule of probability was applied?