# Math

Ann, Mara, Jenny, Tina, and Sue are sisters. Two of the five sisters must help their father at this business each Saturday. How many combinations of two sisters are possible?

1. 0
2. 19
1. 2 * 5 = 10

posted by Blob
2. Blob's answer is not correct.

This is like choosing 2 of 5, which is

C(5,2) = 5!/(3!2!) = 20

posted by Reiny
3. Ann, Mara, Jenny, Tina, and Sue are sisters. Two of the five sisters must help their father at his business each Saturday. How Many Combinations of two sisters are possible?

posted by Kyle
4. 20

posted by Anonymous
5. 5 sisters to fill 2 spots so 4. 5*4=20 then 20/2= 10

posted by Zainab
6. Five sisters times four name pairs for each girl, gives you twenty name combinations. 5×4= 20

posted by Sinai

posted by alsdfdfdca

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