The ratio of the arithmetic mean of two numbers to one of the numbers is 5:9. What is the ratio of the smaller number to the larger number?  Choose the correct choice:
A) 1:5	B) 1:6	C) 1:7	D) 1:8	E) 1:9
For two numbers, the arithmetic mean is the middle of the two numbers.   The ratio of the mean to the larger number is 5:9, thus the smaller number must have a ratio of 1.   The ratio of the smaller number to the larger number is 1:9.   The answer is 1:9.
<result>E</result>
The ratio of the arithmetic mean of two numbers to one of the numbers is 5:9. What is the ratio of the smaller number to the larger number?