GED Practice

GED Math Review: Permutations and Combinations


Questions:


  1. What is the number of permutations of four objects, using all four objects?
    • 1
    • 11
    • 16
    • 24
  2. How many permutations of 10 objects are possible, taking only 3 at a time?
    • 30
    • 120
    • 720
    • 1,000
  3. How many combinations of six objects are possible, taking only 2 at a time?
    • 8
    • 12
    • 15
    • 30
  4. What is the number of combinations possible, taking 3 objects from a set of 10?
    • 30
    • 120
    • 720
    • 1,000
  5. Classify each counting problem by writing permutation or combination in the answer box.
    • In how many ways can 9 artists be judged for first, second, and third prize?
      ________________________
    • How many three-ingredient sandwiches can you make from ham, turkey, roast beef, salami, cheese, and pickles?
      ________________________
  6. In how many ways can 9 students be seated at 5 dest?
    • 45
    • 126
    • 15,120
    • 59,049
  7. In how many ways can you form a group of 4 students from a class of 10?
    • 40
    • 210
    • 5,040
    • 10,000
Answers:

  1. 24
  2. 720
  3. 15
  4. 120
  5. a) permutation b) combination
  6. 15,120
  7. 210




Reference:




Complete Test Preparation for the GED Test 2014 by Steck-Vaughn