Question

a jar has 19 marbles and 5 of them are green. you pull 3 marbles without a replacement what is the probability that they are all green?

Answer 1

wrong

Answer 2

The probability of pulling a green marble on the first draw is 5/19.
Since there is no replacement, the probability of pulling a green marble on the second draw is 4/18.
Similarly, the probability of pulling a green marble on the third draw is 3/17.

Therefore, the probability of pulling 3 green marbles in a row is:
(5/19) * (4/18) * (3/17) = 0.0115

So, the probability of pulling 3 green marbles without replacement is 0.0115 or approximately 1.15%.

Answer 3

I apologize for the mistake. Let's try to solve it again.

The probability of pulling a green marble on the first draw is 5/19.
Since there is no replacement, the number of green marbles decreases by 1 after each draw.
So the probability of pulling a green marble on the second draw is 4/18.
And the probability of pulling a green marble on the third draw is 3/17.

Therefore, the probability of pulling 3 green marbles in a row is:
(5/19) * (4/18) * (3/17) = 0.0118

So, the correct probability of pulling 3 green marbles without replacement is 0.0118 or approximately 1.18%.