An automobile company has 6,500 dealers who are polled to find out their annual incomes as well as

their age. The number of dealers in each category are given below:

Incomes (dollars) Dealers under 40 Dealers 40 and above Total

Under 100,000 1,500 1,500 3,000

100,000 and over 1,000 2,500 3,500

Total 2,500 4,000 6,500

What is the probability that a randomly chosen dealer will:

a) Have an income under $100,000?

b) Will have an income under $100,000, given that he or she is under 40?

c) Be age 40 and above, given they have an income of $100,000 and over?