Correct Answer - Option 3 : The price of a pen is two times the price of a pencil
Jay bought 3 pens and 5 pencils
Vijay bought 2 pens and 7 pencils
Both Jay and Vijay spent same amount of money.
Let the price of each pen is x and each pencil is y.
Money spent by Jay = 3x + 5y
Money spent by Vijay = 2x + 7y
Since both amounts are equal,
⇒ 3x + 5y = 2x + 7y
⇒ x = 2y
So, price of pen is double that of pencil.
Hence, option 3 is correct.