Math

posted by .

One bag contains 4 white balls and 3 black balls. If someone draws one ball from the bag and then replaces it and draws another, what is the probability that both will be black?

A: 8/12


B: 9/49


C: 1/6


D: 3/7

  • Math -

    Do you think the balls remember what happened to them on the first draw when you do the second draw ?

    What is the prob of drawing a black ball the first time?

  • Math -

    Is it A?

  • Math -

    Why do you think it is A? are you guessing?
    What is the prob of getting a black in the first draw?

  • Math -

    the prob is 3/4 i think

  • Math -

    OHHH IS IT D??

  • Math -

    no and no

    There are 7 balls in the bag of which 3 are black
    So the prob of drawing a black the first time is 3/7

    So what will happen the second draw??
    What is the answer to the first question I asked you?

  • Math -

    Oh b: 9/49

  • Math -

    You got it!!

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. ******MATH 12*******

    How about this. One bad contains 4 white balls and 6 black balls. Another bag contains 8 white balls and 2 black balls. A coin tossed to select a bad, then a ball is randomly selected from that bag. a. What is the probability that …
  2. Probability

    A bag contains 5 white discs and 5 black discs. Two players draw discs from the bag one at a time in turns and do not replace them. Andy goes first and draws a white disc. Beth follows and draws a white disc. (a)What is the probability: …
  3. FINITE

    selection of colored balls from two bags. Assume that each bag contains 4 balls. Bag a contains 2 red and 2 white, while bag b contains 2 red, 1 white, and 1 blue. You randomly select one ball from bag a, note the color, and place …
  4. MATH 12 HELP!

    One bag contains 4 white balls and 6 black balls. Another bag contains 8 white balls and 2 black balls. A coin tossed to select a bad, then a ball is randomly selected from that bag. Suppose white ball was drawn. What is the probability …
  5. Math (Probability)

    An urn A contains 6 white balls and 7 black balls. And urn B contains 8 white balls and 6 black balls. A person draws a ball at random from one of the two urns. It turns out to be black. What is probability that the ball was drawn …
  6. Math (Probability)

    An urn A contains 6 white balls and 7 black balls. And urn B contains 8 white balls and 6 black balls. A person draws a ball at random from one of the two urns. It turns out to be black. What is probability that the ball was drawn …
  7. probabilities

    A bag contains 3 green balls. 2 red balls and a white ball. A boy randomly draws balls from the bag one at a time (with replacement) until a red ball appears. Find the probability that he will make at least 3 draws.
  8. Maths

    Bag A contains 2 white, 1 black and 3 red balls, Bag B contains 3 white, 2 black and 4 red balls and Bag C contains 4 white, 3 black and 2 red balls. One Bag is chosen at random and 2 balls are drawn at random from that Bag. Of the …
  9. statistics

    one bag contains 4 white balls,2 black balls.another bag contains 3 white balls 5 black balls.if one ball is drawn from each bag. find that a) both are white?
  10. Math

    A bag contains 5 red balls, 4 white balls, and 3 black balls. Two balls are drawn without replacement. What is the probability that at least one ball drawn is white?

More Similar Questions