12 white marbles from (7+3+12) = 22 marbles
Chance of a white marble on first pick = 12/22 = 6/11.
Chance of a white marble on second and third picks are the same, as the marble is replaced.
So, the chance of a white marble three times is 6/11 * 6/11 * 6/11 = 216/1331 = approximately 16.23%
2/21
11 marbles total and 6 are blue so probability is 6/11
The probability is 0.56
3/5
There are a total of 25 Marbles The chances are 3 out of 25 drawing a Red marble. 3/25 = 12% chance of drawing a red marble
if there is a jar containing 5 red marbles 6green and 4 blue what is the probability off not chossing a blue marble
The probability of selecting a red marble is 3/9
2/6
3/6 or 1/2 or 50%
The theoretical probability of randomly picking each color marble is the number of color marbles you have for each color, divided by the total number of marbles. For example, the probability of selecting a red marble is 3/20.
25/50 gives the probability of selecting a blue marble
a black one
Probability of drawing a red marble = 4/16 = 1/4 Probability of drawing not a red marble = 1 - 1/4 = 3/4
None, if all the marbles that you have are yellow!
probability of pulling out a purple marble = 20/85probability of NOT pulling out a purple marble = 1 - 20/85 = 65/85 = 13/17
7/15 for blue marbles and 8/14 for the purple marbles this is dependent probability
it depends how many blue marbles there are and how many marbles total.
The answer is dependent on whether of not you replace the marbles in the jar. If you do, the probability of drawing a red marble is 9 in 15 or 60%, every time. If you do not replace the marbles, the probability of drawing a red marble is 2 in 8 or 25%.