Question

A bag contians 5 blue and 8 red and 7 green marbels. A marble is selacted at random. Find the propobility the marbelis not red.

Answer 1

33%

Explanation:

This is because there are three different types and 33 x 3 = 99 and that is close to 100%.

Answer 2

Total number of marbles = 5 + 8 + 7 = 20

Total number of non-red marbles = 5 + 7 = 12

P(not red) = 12/20 = 3/5

-

Answer: 3/5