If a=7 and b=13, the number of even positive integers less than ab is
Answer Choices
A. \displaystyle\frac{ab-1}{2}
B. \displaystyle\frac{ab}{2}
C. ab-1
D. \displaystyle\frac{a+b}{4}
E. (a-1)(b-1)
If a=7 and b=13, the number of even positive integers less than ab is
Answer Choices
A. \displaystyle\frac{ab-1}{2}
B. \displaystyle\frac{ab}{2}
C. ab-1
D. \displaystyle\frac{a+b}{4}
E. (a-1)(b-1)