What is the ratio of blue marbles to all marbles in the bag?
This means that \frac{2}{5} of the marbles in the bag are red. We are not given how many blue and red marbles there are but we can see that the ratio of blue to red marbles is 3:2….Solutions.
| Blue Marbles | Red Marbles | Ratio of Blue to Red Marbles |
|---|---|---|
| 30 | 20 | 30:20 |
| 3x | 2x | 3x:2x |
What is the probability that all three of the selected marbles were green given that two of the marbles were green?
On the first, you have 10/16 chances to draw a red. Supposing this red is not replaced, the chance of drawing a second red will be 9/15; therefore, the probability of A is (10/16) * (9/15) = 0.375. Event B is translated into 2 events: Blue + (White or Red) or (White or Red) + Blue.
What is the exact probability that both marbles drawn will be red?
Assuming we draw a red marble from the bag, there is one less red marble and one less total marble. This means for the second drawing there is a 2/11 chance of drawing a red marble. This means the probability of drawing two red marbles is 1/22.
What is the least possible number of marble in the bag?
(i) The least possible number of marbles in the bag is 31, since 30 is the amount of marbles each person can have evenly, +1 makes 1 leftover. So for the first answer, it is A. Another possible number of marbles in the bag is 61 since 60 is divisible by 2, 3, and 5, +1 makes 1 leftover.
What fraction of the marbles are red or blue?
2 Answers By Expert Tutors Blue = 3/5 (6/10) so Red = 2/5 (4/10).
What is the probability of choosing any colored marble?
If you have picked a white marble (probability 2/5) the probability to pick again the white marble is 1/4. You multiply these probabilities and you get 2/20. In case of the blue marble the corresponding probabilities are 3/5 and 2/4 so the product is 6/20.
What is the probability that you draw a blue marble first and a red marble second?
The probability of drawing a blue marble is now = 1/4. The probability of drawing a red marble = 2/5.
How many marbles are in a bag?
Product Description. Bag of Marbles Description Bag of 30 glass replacement marbles for Blocks and Marbles sets. Made in USA.
What is the probability that a bag of marbles is blue?
If a bag contains 4 red marbles, 3 blue marbles, and 7 green marbles and a marble is randomly selected from the bag, what is the probability that it is blue? The answer is 3/14. A bag of marbles contains 2 red marbles, 1 blue marble, and 1 green marble.
How many marbles are in a bag of marbles?
A bag contains 5 black marbles, 7 blue marbles, 3 green marbles, 4 red marbles and 1 white marble. A marble is selected and then replaced, and a second marble is chosen. What is the probability of selecting a black marble and then a red marble?
What happens when you pick a black marble and replace it?
Selecting a black marble followed by selecting a red marble is 1/20. Two events will happen with replacement, so when you would pick a marble and then take it back to the bag, the total number of marbles remain the same. The logical operation for and is multiplication.