a is an integer greater than 9 but less than 21, b is an integer greater than 19 but less than 31, what is the range of a/b?
Choose the correct choice from the following choices:
A) 1/4 B) 1/2 C) 2/3 D) 1 E) 5/4
min value of a/b will be when b is highest and a is lowest ---&gt; a=10 and b=30   So, a/b = 1/3   max value of a/b will be when b is lowest and a is highest ---&gt; a=20 and b=20   So, a/b = 1   Range is 1-(1/3) = 2/3.   Answer should be 2/3
<result>C</result>
a is an integer greater than 9 but less than 21, b is an integer greater than 19 but less than 31, what is the range of a/b?