The Probability That The Second Marble Is Blue

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 that the second marble is blue.

The probability is. 1 4 c 1 7 or d. P b 2 b 1 2 11. P b 2 p b 2 b 1 p b 2 g 1 p b 2 r 1 thus.

Answer by stanbon 75887 show source. A draw a tree diagram with probabilities to represent the sample space. This is because we are removing marbles from the bag. If we got a blue marble before then the chance of a blue marble next is 1 in 4.

Now find the probability that the second marble is blue this is p b. The probability is. B find the probability that one orange marble and one blue marble are drawn in either order. P b 2 3 12 2 11 4 12 3 11 5 12 3 12.

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. What is the probability that the first marble is blue and the second marble is green. So the next event depends on what happened in the previous event and is called dependent.

The probability of selecting a red marble and then a blue marble is 0 28. C find the probability that two white marbles are drawn. A bag contains red and blue marbles. P a b 7 12 5 11.

The second marble is blue given the first marble is red. So i got rd 1 4 and blue 1 7 so 1 4 1 7 1 28 but my choices are 1 8 b. Probability of the first marbel being blue is. P b 1 1 4.

One marble is removed from the box and then replaced. 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. 2 7 so i am not sure what i am doing wrong.

2 marbles are drawn without replacement from a box of 3 white 2 green 2 red and 1 blue marble. The probability of selecting a red marble on the first draw is 0 5. If we got a red marble before then the chance of a blue marble next is 2 in 4. You can put this solution on your website.

Two marbles are drawn without replacement. 6 orange marbles 8 blue marbles and 6 white marbles.