30 pens and 75 pencils were purchased for 630. If the average price of a pencil was 2.00, find the average price of a pen.
Choose the most appropriate option
A) 10
B) 11
C) 12
D) 13
E) 16

Rationale: "since average price of a pencil = 2 ∴ price of 75 pencils = 150 ∴ price of 30 pens = ( 630 – 150 ) = 480 ∴ average price of a pen = 480 ⁄ 60 = 16 answer e"
Answer: E