Question

Question #ed330

Answer 1

See below. `(1/10) * (1/19) = (1/190)`

Explanation:

The first step is to find the sample size, that is, how many marbles total there are in the bag.

4 + 6 + 2 + 8 = 20 marbles total

The second step is to find the probability of drawing one green marble.

`(2 " green marbles")/(20 " marbles total") = 1/10 " probability of drawing a green marble"`

The third step is to find the probability of drawing a second green marble. Remember, both the sample size and the number of green marbles have changed, since you have already taken one green marble out of the bag.

`(1 " green marble")/(19 " marbles total") = 1/19 " probability of drawing a green marble upon second draw"`

Now, you take the two probabilities and multiply them to get the answer:

`(1/10) * (1/19) = 1/190 " probability of drawing 2 green marbles in a row"`

That's your answer, I hope I helped!