The Probability That The Second Marble Is Blue

The probability p a b is the probability that the first marble is green and the second marble is blue.

The probability that the second marble is blue.

The probability that the first marble is red is 5 20 or 1 4. One marble is removed from the box and then replaced. Answer by stanbon 75887 show source. P b 1 1 4.

P b 2 3 12 2 11 4 12 3 11 5 12 3 12. Probability of the secod marbel being blue given the first one was blue is. The probability of selecting a red marble and then a blue marble is 0 28. The probability of the second marble being blue is 4 19 since we have 1 less marble but not 1 less blue marble.

What is the probability that the first marble is blue and the second marble is green. The second marble is blue given the first marble is red. Two marbles are drawn without replacement. You can put this solution on your website.

So the next event depends on what happened in the previous event and is called dependent. Probability of the first marbel being blue is. P b 2 b 1 2 11. P a b 7 12 5 11.

Now find the probability that the second marble is blue this is p b. The probability is. The probability of the intersection of a and b is. 2 7 so i am not sure what i am doing wrong.

C find the probability that two white marbles are drawn. A bag contains red and blue marbles. Because the first marble is replaced the size of the sample space 9 does not change from the first drawing to the second so the events are independent. So i got rd 1 4 and blue 1 7 so 1 4 1 7 1 28 but my choices are 1 8 b.

Another marble is drawn from the box. P b 2 p b 2 b 1 p b 2 g 1 p b 2 r 1 thus. 2 marbles are drawn without replacement from a box of 3 white 2 green 2 red and 1 blue marble. A draw a tree diagram with probabilities to represent the sample space.

This is because we are removing marbles from the bag. The probability of selecting a red marble on the first draw is 0 5. 1 4 c 1 7 or d. And the probability that the third marble is white is 11 18 because we ve already chosen 2 marbles.

The probability is. If we got a blue marble before then the chance of a blue marble next is 1 in 4.