the set x = { 78 , 910 } . the set y = { 23 , 45 } . 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 ?  Select
A) 7 / 16	B) 5 / 16	C) 3 / 16	D) 7 / 8	E) 5 / 8

Rationale: the total number of x and y pairs is 4 * 4 = 16 . there are five pairs such that x / y is an integer . the probability that x / y is an integer is 5 / 16 . the answer is b .
Answer: B