Question

A bag contains 6 black marbles, 14 white marbles, and 5 grey marbles.

You pick one without looking. What is the probability that the marble will be
either white OR black? Answer as a fraction or whole number in lowest
form.

Answer 1

4/5 chance that the marble you pick will be either white or black

6 + 14 + 5 = 25

Now you take 25 and put 20 over it to get the fraction of 20/25.

Simplify this answer by dividing both of these numbers by 5 to get the fraction 4/5