A sports equipment store sold ping pong rackets for a total of $490. If the average (arithmetic mean) price of a pair of rackets is $9.8, how many pairs were sold?
Choose the correct option
A) 50
B) 100
C) 490
D) 500
E) 980

Rationale: "average price for a pair of rackets = $ 9.8 total cost = $ 9.8 * x = $ 490 x = 50 pairs were sold . answer : a"
Answer: A