The Probability That The Second Marble Is Blue

P b 2 b 1 2 11.

The probability that the second marble is blue.

Probability of the secod marbel being blue given the first one was blue is. 6 orange marbles 8 blue marbles and 6 white marbles. You can put this solution on your website. The probability is.

P b 2 3 12 2 11 4 12 3 11 5 12 3 12. The probability is. And the probability that the third marble is white is 11 18 because we ve already chosen 2 marbles. The probability p a b is the probability that the first marble is green and the second marble is blue.

A draw a tree diagram with probabilities to represent the sample space. Two marbles are drawn without replacement. What is the probability that the first marble is blue and the second marble is green. P b 2 p b 2 b 1 p b 2 g 1 p b 2 r 1 thus.

Another marble is drawn from the box. The probability of selecting a red marble and then a blue marble is 0 28. So i got rd 1 4 and blue 1 7 so 1 4 1 7 1 28 but my choices are 1 8 b. A bag contains red and blue marbles.

If we got a blue marble before then the chance of a blue marble next is 1 in 4. If we got a red marble before then the chance of a blue marble next is 2 in 4. Now find the probability that the second marble is blue this is p b. One marble is removed from the box and then replaced.

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. This is because we are removing marbles from the bag. P b 1 1 4. Answer by stanbon 75887 show source.

Probability of the first marbel being blue is. The probability of the second marble being blue is 4 19 since we have 1 less marble but not 1 less blue marble. The probability that the first marble is red is 5 20 or 1 4. B find the probability that one orange marble and one blue marble are drawn in either order.

P a b 7 12 5 11. 2 7 so i am not sure what i am doing wrong. The second marble is blue given the first marble is red. The probability of selecting a red marble on the first draw is 0 5.

2 marbles are drawn without replacement from a box of 3 white 2 green 2 red and 1 blue marble. So the next event depends on what happened in the previous event and is called dependent.