Question 1133958: Start of Questions
Stu Dent has 11 different math books, 14 different science books and 9 different engineering books. Find the number of ways to pick two books with different subjects.
Hint: Consider 3 separate cases which depend on the selected subjects.
Answer by Glaviolette(140)   (Show Source):
You can put this solution on YOUR website! Your two books could be a math and science, a math and engineering, or a science and engineering. There are 11(14) different ways to get a math and science book, 11(9) different ways to get a math book and an engineering book, and 14(9) different ways to get a science book and an engineering book. Those products are 154, 99, and 126. Those would be added to get 379 total ways.
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