



 
Hakan, Mathematicians call these combinations. You want the number of ways of choosing 6 things from 45 things. The expression for the number of combinations of r things from n things is
where n!, called "n factorial" is defined by n × (n1) × (n2) × ··· × 2 × 1. Thus
I arrived at the value of _{45}C_{6} by asking Google. I went to Google and typed 45 choose 6 into the search window. Google responded with 45 choose 6 = 8 145 060. Penny
 


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