Math (Probability)

posted by .

Hassan has a bag which contains 20 coloured discs. He randomly chose three discs from the bag and found that two were red and one was white.

a) Based on this sample, how many of each coloured disc are in the bag?

b) Hassan returned the three discs to the bag and then randomly seleceted another three. This time he selected two whites and one red. How many of each coloured disc do you think are in the bag?

---> Please help me on how to solve these questions... Thank you

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. 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: …
  2. statistics

    Assume that each bag contains 6 balls. Bag a contains 3 red and 3 white, while bag b contains 2 red, 2 white, and 2 blue. You randomly select one ball from bag a, note the color, and place the ball in bag b. You then select a ball …
  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. maths-probabilty(URGENTLYYY)

    There are two bags out of which Bag 1 contains 2 white and 3 red balls and bag 2 contains 4 white and 5 red balls. 1 ball is drawn at random from one of the bags and is found to be red. Find the probability that it was drawn from bag …
  5. maths-probabilty

    There are two bags out of which Bag 1 contains 2 white and 3 red balls and bag 2 contains 4 white and 5 red balls. 1 ball is drawn at random from one of the bags and is found to be red. Find the probability that it was drawn from bag …
  6. maths- probabilty(me posted third time)plse answer

    There are two bags out of which Bag 1 contains 2 white and 3 red balls and bag 2 contains 4 white and 5 red balls. 1 ball is drawn at random from one of the bags and is found to be red. Find the probability that it was drawn from bag …
  7. maths-probabilty

    Bag 1 contains 2 white and 3 red balls and bag 2 contains 4 white and 5 red balls. 1 ball is drawn at random from one of the bags and is found to be red. Find the probability that it was drawn from bag 2
  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. Math

    A bag contains 5 red and 4 green discs , three discs are randomly drawn from a bag what is the probability at least 1 is red and the probability at most one is green?
  10. Math

    A bag contains 8 white, 6 black and 4 red discs. They are selected at random and not replaced. What is the probability that there is at least one black disc in the first four discs drawn out of the bag?

More Similar Questions