Question

A bag contains 5 blue marbles, 4 red marbles, and 3 orange marbles. You ask a friend to pick one without looking. What is the

probability that he picks one that is not red?

Answer 1

he’ll probably pick the blue marble

Answer 2

8/12

5 (blue) +3 (orange) +4 (red) =12 (total)

5 (blue) +3 (orange)=8 (number of marbles that aren't red) or 12 (total) - 4 (red marbles)=8

or 66.6667%