A marketing survey of Anytown found that the ratio of trucks to sedans to motorcycles was 3:7:2, respectively. Given that there are 10,500 sedans in Anytown, how many motorcycles are there? Choose the correct choice from the following answers:
A) 1260  B) 3000  C) 3600  D) 4200  E) 5200
Let the total number of trucks = 3x   total number of sedans = 7x   total number of motorcycles = 2x   total number of sedans = 10500   =&gt; 7x = 10500   =&gt; x = 1500   total number of motorcycles =2x = 2*1500= 
<gadget id="calculator">2*1500</gadget>
<output>3_000</output>
3000   Answer 3000
<result>B</result>
A marketing survey of Anytown found that the ratio of trucks to sedans to motorcycles was 3:7:2, respectively. Given that there are 10,500 sedans in Anytown, how many motorcycles are there?