Question

A bag has 5 red marbles, 6 blue marbles and 4 black marbles. What is the probability of picking a red marble, replacing it, and then picking another red marble?
4/45
1/15
1/9
8/75

Answer 1

I'm thinking 1/15

Answer 2

1/15

Answer 3

why isn't it 1/9?

Answer 4

5/15 * 5/15 = 1/3 * 1/3 = 1/9 ?? idk

Answer 5

Well there are 15 balls in all that you are picking out of and not nine balls

Answer 6

but don't you have to reduce it down

Answer 7

Yea that got me too