Evaluate ${ } _ { n } C _ { r }$ using the formula from this section.? ${ } _ { 5 } C _ { 2 }$ ?
A)20
B)28
C)10
D)21
E)15

Name: Evaluate ${ } _ { n } C _ { r }$ using the formula from this section.? ${ } _ { 5 } C _ { 2 }$ ? A)20 B)28 C)10 D)21 E)15
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Question

Quizplus · Accepted Answer

${ } _ { 5 } C _ { 2 } = \frac{5!}{2!(5-2)!} = \frac{5 \times 4}{2 \times 1} = 10$.

Evaluate nCr{ } _ { n } C _ { r }n​Cr​

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