SOLUTION: if 4Cr represents the number of combinations of n items taken r at a time, what is the value of sigma[1,3,[4Cr]? answers are: (1)24, (2)6, (3)14, (4)4. where r=1 thank you in a

Algebra ->  Sequences-and-series -> SOLUTION: if 4Cr represents the number of combinations of n items taken r at a time, what is the value of sigma[1,3,[4Cr]? answers are: (1)24, (2)6, (3)14, (4)4. where r=1 thank you in a      Log On


   



Question 374598: if 4Cr represents the number of combinations of n items taken r at a time, what is the value of sigma[1,3,[4Cr]? answers are: (1)24, (2)6, (3)14, (4)4.
where r=1
thank you in advance for your help.

Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
sum%284Cr%2Cr=1%2C3%29=4C1+%2B+4C2+%2B+4C3+=+4%2B6%2B4+=+14


Note: Check out this solver for more help with combinations.


So sum%284Cr%2Cr=1%2C3%29+=+14, which means that the answer is choice (3)