Question

A bag contains 3 red marbles, 4 blue marbles, and 5 white marbles. What is the probability of pulling out two red marbles in a row if none are replaced?

Answer 1

probability of getting a first marble in the first try is?

Answer 2

red marbles/ total marbles

Answer 3

5 white marbles

Answer 4

3

Answer 5

3/12= 1/4

Answer 6

you have to account for the other marbles as well

Answer 7

now for the second try you have to subtract one red marble and one from total marble

Answer 8

its be 12