Algebra 1

posted by .

I do not understand how to figure out probability.

Lee has an urn with 8 white marbles and 10 black marbles. A marble is drawn at random and not replaced. Then a second marble is drawn randomly. What is the probability that the first is white and the second is black?

  • Algebra 1 -

    prob(1st is white) = 8/18
    there are now 17 left of which 10 are black , so
    prob(2nd black) = 10/17

    so prob (of your event) = (8/18)(10/17) = 40/153

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Algebra 1

    I do not understand how to figure out probability. Lee has an urn with 8 white marbles and 10 black marbles. A marble is drawn at random and not replaced. Then a second marble is drawn randomly. What is the probability that the first …
  2. Algebra 2

    a bag contains 3 red marbles and 6 green marbles a marble is drawn and then replaced a second marble is drawn and replaced and then a third marble is drawn what is the probability that a red marble is drawn all 3 times?
  3. Algebra 2

    a bag contains 3 red marbles and 6 green marbles a marble is drawn and then replaced a second marble is drawn and replaced and then a third marble is drawn . What is the probability that a red marble is drawn all 3 times?
  4. Math

    Can somebody help me solve this problem ?
  5. math

    an urn contains 6 purple marbles and 4 pink marbles. a marble is drawn at random and not replaced. then a second marble is drawn. what is the probability that both marbles are purple?
  6. Math

    A bag contains 2 white marbles and 7 purple marbles. Two marbles are drawn at random. One marble is drawn and not replaced. Then a second marble is drawn. A) What is the probability of selecting a purple marble and then a white marble?
  7. Math HELP! Ms.Sue

    A bag contains 2 white marbles and 7 purple marbles. Two marbles are drawn at random. One marble is drawn and not replaced. Then a second marble is drawn. 1. What is the probability of selecting a purple marble and then a white marble?
  8. HELP!! MATH!

    A bag contains 2 white marbles and 7 purple marbles. Two marbles are drawn at random. One marble is drawn and not replaced. Then a second marble is drawn. 1. What is the probability of selecting a purple marble and then a white marble?
  9. Math 141

    Box A contains 3 white marbles and 4 black marbles. Box B contains 6 white marbles and 5 black marbles. An experiment consists of first selecting a marble at random from Box A. The marble is transferred to Box B and then a second marble …
  10. Math :(

    A bag contains 2 white marbles and 7 purple marbles. Two marbles are drawn at random. One marble is drawn and not replaced. Then a second marble is drawn. 1. What is the probability of selecting a purple marble and then a white marble?

More Similar Questions