10*9*8=720
5/10
12 blue marbles
20% are green
If there are 20 red marbles and 40 blue marbles, the ratio of red to blue is 1 over 2. The number of white marbles does not matter.
1 in 52
6
5/10
The sample space for pulling marbles out of a bag containing 6 red, 3 yellow, 1 black, and 1 green marble, when drawing 2 at a time, consists of all possible combinations of two marbles. Each combination can include two marbles of the same color or one marble of different colors. For example, possible outcomes include (red, red), (red, yellow), (yellow, green), and so on. The total number of combinations can be calculated using combinatorial methods, but the sample space itself includes all unique pairs of the marbles.
Number of different possible choices = 8 + 6 + 9 = 23Number of available successful choices (blue marbles) = 6Probability of success = 6/23 = 0.26087 = 26.087 %(rounded)
it is 5
There are 6!/3! = 120 possible combinations of marble colour. Of these, only 2 are "good". This gives a probability of 2/120 = 1/60 = 0.0167, or about one and two-thirds of a percent.
56 marbles
700 bags if each bag contains 8 marbles is a total of 5600 marbles.
9:10
12 blue marbles
12 blue marbles
24 red marbles