30 pens and 75 pencils were purchased for 750. If the average price of a pencil was 2.00, find the average price of a pen.  Pick: A) 20 B) 11 C) 12 D) 13 E) 14

Rationale: "since average price of a pencil = 2 ∴ price of 75 pencils = 150 ∴ price of 30 pens = ( 750 – 150 ) = 600 ∴ average price of a pen = 600 ⁄ 60 = 20 answer a"
Answer: A