The Probability That The Second Marble Is Blue

A bag contains red and blue marbles.

The probability that the second marble is blue. If we got a red marble before then the chance of a blue marble next is 2 in 4. 2 7 so i am not sure what i am doing wrong. One marble is removed from the box and then replaced. The probability is.

Now find the probability that the second marble is blue this is p b. B find the probability that one orange marble and one blue marble are drawn in either order. 2 marbles are drawn without replacement from a box of 3 white 2 green 2 red and 1 blue marble. The probability p a b is the probability that the first marble is green and the second marble is blue.

P b 2 3 12 2 11 4 12 3 11 5 12 3 12. Probability of the first marbel being blue is. The probability of selecting a red marble on the first draw is 0 5. What is the probability that the first marble is blue and the second marble is green.

The probability is. The second marble is blue given the first marble is red. A draw a tree diagram with probabilities to represent the sample space. Two marbles are drawn without replacement.

The probability of selecting a red marble and then a blue marble is 0 28. Probability of the secod marbel being blue given the first one was blue is. P b 2 b 1 2 11. 1 4 c 1 7 or d.

P a b 7 12 5 11. The probability that the first marble is red is 5 20 or 1 4. If we got a blue marble before then the chance of a blue marble next is 1 in 4. C find the probability that two white marbles are drawn.

This is because we are removing marbles from the bag. So i got rd 1 4 and blue 1 7 so 1 4 1 7 1 28 but my choices are 1 8 b. The probability of the second marble being blue is 4 19 since we have 1 less marble but not 1 less blue marble. 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.

And the probability that the third marble is white is 11 18 because we ve already chosen 2 marbles. Another marble is drawn from the box. So the next event depends on what happened in the previous event and is called dependent. You can put this solution on your website.

6 orange marbles 8 blue marbles and 6 white marbles. Answer by stanbon 75887 show source.