The set X = {11,12,13,14,15}. The set Y = {2,3,4,5}. We will randomly choose one element x from set X and one element y from set Y. What is the probability that x / y will be an integer? Choices
A) 11/20 B) 7/20 C) 3/20 D) 7/10 E) 3/10
The total number of x and y pairs is 5*4= 
<gadget id="calculator">5*4</gadget>
<output>20</output>
20.   There are six pairs such that x / y is an integer.   The probability that x / y is an integer is 6/20=3/10.   The answer is 3/10.
<result>E</result>
The set X = {11,12,13,14,15}. The set Y = {2,3,4,5}. We will randomly choose one element x from set X and one element y from set Y. What is the probability that x / y will be an integer?