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

Algebra ->  Probability-and-statistics -> 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      Log On


   

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) About Me  (Show Source):
You can put this solution on YOUR website!
C stands for the combination formula

In general

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