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Evaluate ${ } _ { n } C _ { r }$

Question 93

Question 93

Multiple Choice

Evaluate ${ } _ { n } C _ { r }$ using the formula from this section. ${ } _ { 5 } C _ { 2 }$

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

Correct Answer:

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