math

The diagram below shows the contents of a jar from which you select marbles at random.
There are 4 red marbles, 7 blue marbles, and 5 green marbles.
(A). What is the probability of selecting a red marble, replacing it, and then selecting a blue marble?
(B). What is the probability of selecting a red marble, setting it aside, and then selecting a blue marble?
(C). Are the answers to part (A) and part (B) the same? why or why not?

  1. 👍
  2. 👎
  3. 👁
  1. a) prob(red) = 4/16 = 1/4
    your are replacing the marble, so you are back to 16
    prob(blue) = 7/16
    so prob(red, then blue) = (1/4)(7/16) = 7/64 or appr .109

    b) prob(red) = 1/4 , just as before
    but you are not returning the marble, so there are only 15 left
    prob(blue) = 7/15
    prob(red, then blue) = (1/4)(7/15) = 7/60 = appr .117

    c) leave it up to you ....

    1. 👍
    2. 👎
  2. thank you for your help!

    1. 👍
    2. 👎
  3. if you put in the writen responce will the teacher now that you plagerized the work

    1. 👍
    2. 👎
  4. nope

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. PLEASE HELP!

    A jar contains 24 blue marbles, 16 red marbles, and 14 white marbles. Find the simplified ratio of total marbles to red marbles.

  2. math

    Mrs. Morton has a special reward system for her class. When all her students behave well, she rewards them by putting 333 marbles into a marble jar. When the jar has 100100100 marbles or more, the class has a party. Right now, the

  3. Stats

    You draw two marbles at random from a jar that has 20 red marbles and 30 black marbles without replacement. What is the probability that both marbles are red?

  4. math

    a jar contains 5 blue marbles, 8 red marbles,4 white marbles,and 3 purple marbles. suppose you pick a marble at random not looking. what is the chance of getting a red marble

  1. Math

    The ratio of red marbles to blue marbles in a jar is 2 to 5. If there are 35 blue marbles in the jar, how many red marbles are there? 5 x7 =35 2x7=14 red marbles is this right

  2. Math

    The ratio of red marbles to blue marbles in a jar is 2 to 5. If there are 35 marbles in the jar, how many red marbles are there? Do have the right answer: 2:35

  3. Statistics

    A box contains 4 red marbles and 5 blue marbles. Michelle picks 3 marbles at a random. If Z is the random variable, representing the number of blue marbles picked from the box. Do the ff: A. Express the probability function in

  4. Math

    There are 14 blue marbles 8 red marbles and 12 green marbles in a jar. What is the ratio of the total number of marbles to the number of red marbles? 1: 24:8**** 2: 34:8 3: 8:34 4: 8:24 Can someone check my answers?

  1. math

    a large jar contains 500 identical marbles. Suppose you have an identical empty jar, a set of standard masses and balance scales. How would you find the mass of one marble without opening or breaking the jar? Explain Thanks for

  2. Math

    A jar contains 6 red marbles and 10 blur marbles all of equal size. if Dominic were to randomly select 1 marble without replacement and then select another marble from the jar, what would be the probability of selecting 2 red

  3. Math

    to identical jars are filled with equal amount of marbles. the marbles are coloured red or white. the ratio of red to white marblesis 7:1 in jar 1 and 9:1 in jar 2. if there are 90 white marbles altogether, determine the number of

  4. Geometry

    There are 4 blue marbles, 5 red marbles, 1 green marble, and 2 black marbles in a bag. Suppose you select one marble at random. Find each probability

You can view more similar questions or ask a new question.