8 pens and 3 pencils cost as much as 3 pens and 9 pencils. What is the ratio of the cost of one pen to the cost one pencil?
Answer & explanation
Correct answer: option 2
8 Pens + 3 pencil = 3 Pens + 9 Pencil
⇒ 8 Pens - 3 Pens = 9 Pencil - 3 Pencil
⇒ 5 Pens = 6 Pencil
⇒ Pens : Pencil = 6 : 5