Question

Please help quick!

A bag contains 3 red marbles, 5 yellow marbles, and 4 blue marbles. One marble is chosen at random. What is the probability that the chosen marble will not be red?

A. 3/4
B. 1/3
C. 1/4
D. 1/12

Answer 1

3/4 is the answer! hope this helps!

Answer 2

A. 3/4

Explanation:

We can use complementary counting. Since there are 3 red marbles, and a total of 12 marbles, the probability of getting a red one is 3/12 or 1/4. Since we want the probability of choosing something that isn't a red marble, we take 1-1/4 which is 3/4 or a.