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GRE · Quantitativeaptitude · Combinations or Permutations

Exercise and reference answers

Items
  1. Item
    Choose 3 friends to attend a party (no role)
    Answer
    left
  2. Item
    Choose 3 friends for President, VP, Secretary
    Answer
    right
  3. Item
    Arrange 5 books on a shelf
    Answer
    right
  4. Item
    Pick a 5-card hand from a deck
    Answer
    left
  5. Item
    Number of ways to order finalists 1st, 2nd, 3rd
    Answer
    right
  6. Item
    Number of 4-person committees from 10 people
    Answer
    left
Categories
Left
Combination (order doesn't matter)
Right
Permutation (order matters)
Instructions
Sort each counting problem: combination or permutation?
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