The circulation for magazine M in 1961 was 3 times the average (arithmetic mean) yearly circulation for magazine M for the years 1962-1970. What is the ratio of the circulation in 1961 to the total circulation during 1961-1970 for magazine M ? Choose the correct choice from the following choices
A) 9/4
B) 5/4
C) 7/4
D) 3/4
E) 1/4
There are 9 years from 1962-1970, inclusive. Let's say the average circulation every year between 1962-1970 inclusive is x.   So the total circulation is 9x from 1962-1970, inclusive.   In 1961, the circulation is 3x.   So total circulation for 1961-1970 is 3x + 9x = 12x.   Ratio of circulation in 1961 to total circulation during 1961-1970 is 3x to 12x or 3/12 3  + 9= 
<gadget id="calculator"> 3  + 9</gadget>
<output>12</output>
12x.   Ratio of circulation in 1961 to total circulation during 1961-1970 is 3x to 12x or 3/12=1/4   Answer :1/4
<result>E</result>
The circulation for magazine M in 1961 was 3 times the average (arithmetic mean) yearly circulation for magazine M for the years 1962-1970. What is the ratio of the circulation in 1961 to the total circulation during 1961-1970 for magazine M ?