SOLUTION: There is a bag filled with 4 blue, 3 red and 5 green marbles.
A marble is taken at random from the bag, the colour is noted and then it is replaced.
Another marble is taken at
Algebra ->
Probability-and-statistics
-> SOLUTION: There is a bag filled with 4 blue, 3 red and 5 green marbles.
A marble is taken at random from the bag, the colour is noted and then it is replaced.
Another marble is taken at
Log On
Question 1117422: There is a bag filled with 4 blue, 3 red and 5 green marbles.
A marble is taken at random from the bag, the colour is noted and then it is replaced.
Another marble is taken at random.
What is the probability of getting 2 reds? Answer by ikleyn(52803) (Show Source):
In all, there are 4 +3 + 5 = 12 marbles.
The probability to get first marble red is .
The probability to get second marble red is the same .
Since the outcomes of the first and the second experiments are independent,
the probability to get both 2 red marbles is the product = .
Answer. The probability under the question is .
