SOLUTION: Let A = { a , b , c , d , e , f , g } . How many four element subsets of A do not contain the element a?

Algebra ->  Permutations -> SOLUTION: Let A = { a , b , c , d , e , f , g } . How many four element subsets of A do not contain the element a?      Log On


   

Question 1122523: Let A = { a , b , c , d , e , f , g } . How many four element subsets of A do not contain the element a?
Answer by greenestamps(13200) About Me  (Show Source):
You can put this solution on YOUR website!


There are 6 other elements in the set; you can choose any 4 of them to make a subset of 4 elements.

How many ways can you choose 4 of 6 things?

I would hope that if you are working a problem like this you know about the number "6 choose 4"....