SOLUTION: I am having so much trouble figuring out these string problems.I am just wondering if I have this one right. How many 8 bit strings contain exactly 2 1's. If its not right can I g

Algebra ->  Permutations -> SOLUTION: I am having so much trouble figuring out these string problems.I am just wondering if I have this one right. How many 8 bit strings contain exactly 2 1's. If its not right can I g      Log On


   



Question 403381: I am having so much trouble figuring out these string problems.I am just wondering if I have this one right. How many 8 bit strings contain exactly 2 1's. If its not right can I get the answer plus the math to figure it out right. Thanks, Kim
Heres what I have:
C(8,2) 8!/8!2!
8*7*6/2*1*6
56/2
answer 18

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