Math Question!! Jelly Beans..??

Question

Zanda went into a candy store to buy jelly beans. She wanted to choose 3 flavors from the 12 flavors they sold. How many combinations of 3 flavors could she make?

A. 12. B. 36 C. 220 D. 1,320

it seems like they are trying to make it into simple, but hard math, if you know what that means. Or unless im just not getting it. help?

Please and thank you,

Chelse

Answer 1

B

Answer 2

The site below contains the magic formula for figuring out combinations.  It also has practice problems.  Hint:  36 is way too low.  A number tree is exhausting and takes a lot of space, but  I attempted it and stopped when I reached 40+ and I was a long ways from done.

Answer 3

this is a permutation and combination question.

first she had to take 1 flavour out of 12 so 12C1= 12

then 1 from 11 so 11C1= 11

then 1 from 10 so 10C1= 10

12C1* 11C1* 10C1

12*11*10

1320

Answer 4

Short Cut:  mutiply 3 x 12 to get the total number of combos = 36

If you want to check it, do a tree diagram.

Answer 5

Well for her first flavor she has 12 choices

She choses her 2nd flavor from the remaining 11

And her third from the remaining 10

12 x 11 x 10 = 1,320