SOLUTION: Hi, Can you tell me what the C means in some of your answers - I don't know how to calculate this..... e.g. 20C6*0.25^6*0.75^14 =0.1686 the answer you gave me to my previous questi

SOLUTION: Hi, Can you tell me what the C means in some of your answers - I don't know how to calculate this..... e.g. 20C60.25^60.75^14 =0.1686 the answer you gave me to my previous questi

Question 615661: Hi, Can you tell me what the C means in some of your answers - I don't know how to calculate this..... e.g. 20C6*0.25^6*0.75^14 =0.1686 the answer you gave me to my previous question. Sue
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
C stands for the combination formula

In general $\LARGE \dpi{120} _{n}C_{r} = \frac{n!}{r!(n-r)!}$

So in this case, n = 20 and r = 6. So plug them in to get

$\LARGE \dpi{120} _{n}C_{r} = \frac{n!}{r!(n-r)!}$

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