Answer to Question #344251 in Statistics and Probability for paige

Question

There is a bag filled with 5 blue and 4 red 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 1

In case the marble is replaceed, the probability is not changed.

So the probability of getting a red marble is 4/9

The probability of getting 2 reds is 4/9*4/9= 16/81 (about 19.75%)