Ms. Chin lets her students borrow pens and pencils on days when they have a quiz.
She has a paper bag containing hundreds of wooden pencils, mechanical pencils, and blue pens.
Mathias forgot his pencil, and it is quiz day!
Ms. Chin tells him that one out of every three students who reaches into the bag pulls out a wooden pencil. Two out of every five students pull out a mechanical pencil.
The rest of the students pull out a blue pen.
