SOLUTION: Kate wants to choose 3 out 13 different items as the Christmas presents. Given that 4 items are from shop B, and 3 items are from shop C, find the number of combinations in each o

Algebra ->  Permutations -> SOLUTION: Kate wants to choose 3 out 13 different items as the Christmas presents. Given that 4 items are from shop B, and 3 items are from shop C, find the number of combinations in each o      Log On


   

Question 1173928: Kate wants to choose 3 out 13 different items as the Christmas presents. Given that 4 items are from
shop B, and 3 items are from shop C, find the number of combinations in each of the following cases,
Choosing atleast 1 item from shop A
Found 2 solutions by ewatrrr, ikleyn:
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

  6 A , 4 B, 3 C  13 DIFFERENT ITEMS IN ALL 

Choosing at least 1 item from shop A

  (6C1)(7C2) + (6C2)(7C1) + (6C3)(7C0)

Wish You the Best in your Studies.

Answer by ikleyn(52812) About Me  (Show Source):
You can put this solution on YOUR website!
.

At a contest of problems, formulated in worst possible way, this formulation
could win one of top prizes.