Question

There is a bag filled with 4 blue and 5 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

25

/81

Explanation:

5/9 marbles are red

5/9 is the chance for getting one marble. However, twice, you need to multiply it by itself.

The answer is 25/81