Question

Alexis has a pencil bag containing one of more of each of the following: red pens, blue pens, mechanical pencils, and black markers. He knows that there is a 4% chance he will pull a red pen out of the bag if he chooses randomly. What is the number of total pens, pencils, and markers in the bag?
A. 15
B. 20
C. 25
D. 40
E. 60

Answer 1

all we know is that 1/25 of the items are red pens.

Assuming an integer number of items, that makes C the only reasonable choice.