30 pens and 75 pencils were purchased for 690. If the average price of a pencil was 2.00, find the average price of a pen.\nOptions:\n(A) 10\n(B) 11\n(C) 18\n(D) 13\n(E) 14 Now, let's think a bit. Some random thoughts:
User
Since average price of a pencil = 2\n∴ Price of 75 pencils = 150\n∴ Price of 30 pens = (690 – 150) = 540\n∴ Average price of a pen = 540⁄60 = 18
The final answer: (C).
Assistant