Math
posted by Eric .
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?

Math 
Blob
2 * 5 = 10

Math 
Reiny
Blob's answer is not correct.
This is like choosing 2 of 5, which is
C(5,2) = 5!/(3!2!) = 20 
Math 
Kyle
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?

Math 
Anonymous
20

Math 
Zainab
5 sisters to fill 2 spots so 4. 5*4=20 then 20/2= 10

Math 
Sinai
Five sisters times four name pairs for each girl, gives you twenty name combinations. 5×4= 20

Math 
alsdfdfdca
mysis is bad
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