At a certain symphonic concert, tickets for the orchestra level were \(\$50\) and tickets for the balcony level were

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At a certain symphonic concert, tickets for the orchestra level were \(\$50\) and tickets for the balcony level were \(\$30.\) These two ticket types were the only source of revenue for this concert. If \(R\%\) of the revenue for the concert was from the sale of balcony tickets, and \(B\%\) of the tickets sold were balcony tickets, then which of the following expresses \(B\) in terms of \(R?\)

(A) \(\dfrac{200R}{500+3R}\)

(B) \(\dfrac{300R}{500-2R}\)

(C) \(\dfrac{300R}{200+5R}\)

(D) \(\dfrac{500R}{300+2R}\)

(E) \(\dfrac{500R}{200+3R}\)

Answer: D

Source: Magoosh