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TI-Nspire™TI-Nspire™ CAS
3.0
Published on August 29, 2011
Students are led through the development of the formula for finding n objects taken n at a time and then n objects taken r at a time.
Students investigate factorials and the fundamental counting principle. They evaluate given expressions by using the factorial symbol "!".
Problem 2 also gives students the opportunity to explore all possible outcomes of spinning a spinner and flipping a coin.
Students move onto Problem 3 where they find the number of ways n objects can be taken r at a time. They explore and define permutations by listing all the ways the letters a, b, and c can be arranged.