The circulation for magazine P in 1971 was 4 times the average (arithmetic mean) yearly circulation for magazine P for the years 1972-1980. What is the ratio of the circulation in 1971 to the total circulation during 1971-1980 for magazine P ?	Choose the correct choice from the following
A) 4/7
B) 5/7
C) 3/7
D) 2/7
E) 1/7
There are 9 years from 1972-1980, inclusive. Let's say the average circulation every year between 1972-1980 inclusive is x.   So the total circulation is 9x from 1972-1980, inclusive.   In 1971, the circulation is 4x.   So total circulation for 1971-1980 is 4x + 9x = 13x.   Ratio of circulation in 1971 to total circulation during 1971-1980 is 4x to 14x or 4/14 4  + 9= 
<gadget id="calculator"> 4  + 9</gadget>
<output>13</output>
13x.   Ratio of circulation in 1971 to total circulation during 1971-1980 is 4x to 14x or 4/14=2/7   Answer : 2/7
<result>D</result>
The circulation for magazine P in 1971 was 4 times the average (arithmetic mean) yearly circulation for magazine P for the years 1972-1980. What is the ratio of the circulation in 1971 to the total circulation during 1971-1980 for magazine P ?