4th Grade Math
posted by Kristiana .
In the set of all whole numbers from 20 to 29,what fraction have two integers which add up to 7?
A.1/9
B.1/10
C.5/10
D.9/10

20, 21, 22, 23, 24, 25, 26, 27, 28, 29
I only see one set of digits whose sum is 7. 
IDK that's why i need help last yr. our teacher didn't teach us any of this so it is difficult.

Please read my explanation to your later problem. Then, post your answer here and I'll check it.

plz help me i don't get this at all and i've never done it b4 and i really need help
