a black one
The probability is 0.3692
1/3
The probability is 2/15.
It can do - particularly in a probability question.
The probability of selecting a red marble is 3/9
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.
3/6 or 1/2 or 50%
a black one
The probability is 0.3692
25/50 gives the probability of selecting a blue marble
2/6
The probability is 0.56
1/3
1
The probability is 2/15.
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%.