The Probability of drawing two black balls in succession from a bag containing 4 red and 3 black balls when the ball first drawn is
a) replaced
b) not replaced

  1. 👍 2
  2. 👎 0
  3. 👁 182
asked by viru
  1. a) if replaced, prob = (3/7)(3/7) = 9/49

    b) if not replaced prob = (3/7)(2/6) = 1/7

    1. 👍 2
    2. 👎 0
    posted by Reiny

Respond to this Question

First Name

Your Response

Similar Questions

  1. Math

    A bag contains 3 black balls, 4 green balls and 5 yellow balls. a) if two balls are picked at random without replacement, find the probability that Botha balls are of the same color. b) How many black balls must be added to the

    asked by kd on May 7, 2019
  2. stats

    A jar contains 7 black balls and 25 red balls. You take 2 out without replacing them. Find a)the probability of drawing 2 red balls in a row, b) the probability of drawing a red ball, then a black ball, c) the probability that the

    asked by Sally on December 18, 2014
  3. 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

    asked by Susan on August 17, 2014
  4. Finite Math

    Two balls are drawn from a bag with 4 black balls and 2 white balls. Find th probability distribution got drawing 2 black balls.

    asked by Ericka on June 16, 2013
  5. Math

    A bag contains three black balls, four white balls and five red balls. Three balls are removed without replacement. What is the probability of obtaining a one of each colour b at least two red balls ?

    asked by Ariyo on September 27, 2014
  6. probability

    a bag contains 14 identical balls,3of which are red, 4black and 7 white .5 balls are drawn from the bag .find the probability that[1] are red [2] at least 3 are black

    asked by sajid on January 17, 2012
  7. Probability -- Help?

    Sampling one at a time with replacement from a bag with 8 blue, 7 red, and 5 green. What is the probability of getting at least two red in 3 draws? The book says the probability is 0.2818 but doesn't explain why. Any help????

    asked by Cheri on December 1, 2006

    from a bag containing 6 white balls, 3 black balls and 13 red balls, two balls are drawn at random. what is the probability that they are both red?

    asked by kay on June 26, 2016
  9. Maths

    A bag contains 18 balls out of which x balls are red balls will be 9/8 times the probability of not drawing red balls. Find value of x .

    asked by Dewanshi on October 1, 2017
  10. 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

    asked by Hil-hellpp! on February 16, 2011

More Similar Questions