Question

A box contains 3 plain pencils and 9 pens. A second box contains 9 color pencils and I crayon. One item from each box is chosen at random. What is the
probability that a pen from the first box and a crayon from the second box are selected?
Write your answer as a fraction in simplest form.

Answer 1

The answer is 3/40. Because 9/12=3/4. That has to be multiplied by 1/10. That will give 3/40.