Suppose that a and b are integers with 4<a<b<22. If the average (mean) of the numbers 4,a,b,22 is 13, then the number of possible pairs (a,b) is
Answer Choices
A. 10
B. 8
C. 7
D. 9
E. 6
Suppose that a and b are integers with 4<a<b<22. If the average (mean) of the numbers 4,a,b,22 is 13, then the number of possible pairs (a,b) is
Answer Choices
A. 10
B. 8
C. 7
D. 9
E. 6