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    Mathematics
  3. Study Set
    Precalculus
  4. Exam
    Exam 57: Counting Principles
  5. Question
    Evaluate\({ } _ { n } C _ { r }\)
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Evaluate nCr{ } _ { n } C _ { r }n​Cr​

Question 41

Question 41

Multiple Choice

Evaluate nCr{ } _ { n } C _ { r }n​Cr​ using the formula from this section.? 5C2{ } _ { 5 } C _ { 2 }5​C2​ ?


A) 20
B) 28
C) 10
D) 21
E) 15

Correct Answer:

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