Math

posted by .

The odds are 3 to 5 in favor of drawing a blue marble in one random drawing from an urn containing only red and blue marbles. There are more than 100 marbles in the urn. what is the minimum number of red marbles that there could be in the urn?

• Math -

prob of blue = 3/8

r/100 = 5/8 ---red = 62.5 or 63
b/100 = 3/8 --- blue = 37.5 or 38

Similar Questions

1. algebra 2

The bag contains three red marbles, two blue marbles, and seven yellow marbles. Two marbles are randomly drawn from the bag. What is the probability of drawing a blue marble, replacing it, and then drawing a blue marble?
2. statistics

SUPPOSE A URN CONTAINED 3 RED, 6 BLACK, 5 BLUE, 2 YELLOW AND 4 GREEN MARBLES. WHAT IS THE PROBABILITY OF DRAWING A BLUE MARBLE?
3. Mathematics

There are 2 white marbles in urn A and 4 red marbles in urn B . At each step of the process a marble is selected from each urn and the 2 marbles are interchanged.What is the probability that there 2 red marbles in in urn A after three …
4. math

An urn contains 5 red marbles, 4 blue marbles, and 3 green marbles. A marble is selected at random and then, without replacing the first marble, a second marble is selected at random. What is the probability of selecting a green marble …
5. Math

There are 10 marbles in a bag. 5 blue, 3 red and 2 green. If you draw 1 marble at random, What are the odds in favor of drawing a red marble?
6. MATH

You have a bag of marbles containing 13 red marbles, 8 green marbles, 7 yellow marbles, and 7 blue marbles. What is the probability of drawing a green marble, putting the marble in your pocket and then drawing a yellow marble?
7. Math-Probability

Suppose an urn contains 8 red,5 white and 7 blue marbles.If 3 marbles are drawn at random from the urn with replacement,what is the probability that three marbles are the same color?
8. Math

Suppose an urn contains 8 red,5 white and 7 blue marbles.a.If 3 marbles are drawn at random from the urn with replacement,what is the probability that three marbles are red?
9. Math

there are 9 blue marbles, 4 black marbles, 5 white marbles and 6 red marbles. If the probability of drawing a blue marble is now 1/3, how many of the 6 marbles removed were blue?
10. Finite Math

An urn contains 8 blue marbles and 7 red marbles. A sample of 6 marbles is chosen from the urn without replacement. What is the probability that the sample contains at least one blue marble?

More Similar Questions

Post a New Question