A sports equipment store sold ping pong rackets for a total of $686. If the average (arithmetic mean) price of a pair of rackets is $9.8, how many pairs were sold? Choose the correct answer:
A) 50
B) 100
C) 70
D) 500
E) 980
Average price for a pair of rackets = $9.8   Total cost = $9.8*x = $686   x = 70 pairs were sold.   ANSWER:70
<result>C</result>
A sports equipment store sold ping pong rackets for a total of $686. If the average (arithmetic mean) price of a pair of rackets is $9.8, how many pairs were sold?