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
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
24