Question

O There is a bag filled with 6 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 blues?

Answer 1

3/11

Explanation:

Probability of first marble is blue is 6/11, then there only 5 blue marbles left, so probability of second marble is blue is 5/10 = 1/2. 6/11 * 1/2 = 3/11