• Example 5:
Sam is going to assemble a computer by himself. He has the
choice of ordering chips from two brands, a hard drive from
four, memory from three, and an accessory bundle from five
local stores. How many ways can Sam order the parts?
• Example 6:
How many even four-digit numbers can be formed from the
digits 0, 1, 2, 5, 6 and 9 if each digit can be used only once?