OpenStax, Algebra and Trigonometry 2e §13.5 Counting Principles · Exercise 17 · Combinatorics · Permutations & combinations
Counting Principles · Exercise 17
Determine whether to use the Addition Principle or the Multiplication Principle. Then perform the calculations.
How many outcomes are possible from tossing a pair of coins?
Its source prints no answer for this problem, so there's nothing to check against.
OpenStax, Algebra and Trigonometry 2e · §13.5 Counting Principles · Exercise 17
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