The Probability That The Second Marble Is Blue

C find the probability that two white marbles are drawn. If we got a blue marble before then the chance of a blue marble next is 1 in 4. One marble is removed from the box and then replaced.

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1 4 c 1 7 or d.

The probability that the second marble is blue.

A bag contains red and blue marbles. P b 2 b 1 2 11. P b 2 3 12 2 11 4 12 3 11 5 12 3 12. The probability is.

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. The probability of the second marble being blue is 4 19 since we have 1 less marble but not 1 less blue marble. Now find the probability that the second marble is blue this is p b. The probability p a b is the probability that the first marble is green and the second marble is blue.

Answer by stanbon 75887 show source. 6 orange marbles 8 blue marbles and 6 white marbles. P b 1 1 4. Probability of the first marbel being blue is.

The probability is. And the probability that the third marble is white is 11 18 because we ve already chosen 2 marbles. So i got rd 1 4 and blue 1 7 so 1 4 1 7 1 28 but my choices are 1 8 b. What is the probability that the first marble is blue and the second marble is green.

Probability of the secod marbel being blue given the first one was blue is. You can put this solution on your website. This is because we are removing marbles from the bag. 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. A draw a tree diagram with probabilities to represent the sample space. Two marbles are drawn without replacement. 2 7 so i am not sure what i am doing wrong.

P a b 7 12 5 11. The probability of the intersection of a and b is. So the next event depends on what happened in the previous event and is called dependent. The second marble is blue given the first marble is red.

If we got a red marble before then the chance of a blue marble next is 2 in 4. 2 marbles are drawn without replacement from a box of 3 white 2 green 2 red and 1 blue marble. B find the probability that one orange marble and one blue marble are drawn in either order. The probability of selecting a red marble on the first draw is 0 5.

The probability of selecting a red marble and then a blue marble is 0 28. The probability that the first marble is red is 5 20 or 1 4.

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