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Combination, Permutation, or Counting Principle
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A teacher needs to select 3 students from their class of 25 carry items to the main office.
Combination, ₂₅C₃ = 2300
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How many ways can a phone with 10 digits be set with a 4 digit code?
Permutation, ₁₀P₄ = 5040
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Only 6 cheerleaders out of 20 are allowed to cheer at the basketball game.
Combination, ₂₀C₆ = 38760
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How many ways can be a burger be made given 3 bun options, 2 meat, and 5 condiments?
Counting Principle, 3 ∙ 2 ∙ 5 = 30
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Only the top 5 runners out of 30 get to advance to finals.
Combination, ₃₀C₅ = 142506
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How many ways can the letters HAWT be arranged?
Counting Princple, 4 ∙ 3 ∙ 2 ∙ 1 = 24 (Permutation also acceptable)
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Seven athletes are competing for Gold, Silver and Bronze.
Permutation, ₇P₃ = 210
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How many ways can a Captain and Co-Captain be determined from a team of 8?
Permutation, ₈P₂ = 56
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The number of ways Lego bricks can be stacked given one yellow, one blue, one red, and one green
Counting, 4 ∙ 3 ∙ 2 ∙ 1 = 24 (Permutation also acceptable)
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