Question

A bag contains 40 marbles. Eight are green and 2 are blue. You select one marble at random. What is the probability the marble is green or blue.

Answer 1

1/4

Explanation:

Find the total of green and blue marbles

8 + 2 = 10

Now find the probability of either green or blue

(p green or blue) = 10/40

reduce

(p green or blue) = 1/4