5

There is a bag filled with 3 blue and 4 red marbles.

A marble is taken at random from the bag, the colour is noted and then it is not replaced.

Another marble is taken at random.

What is the probability of getting 2 blues?

Answer: 33.33%

Step-by-step explanation:

why You can just use some sort of counting principle

The first time you draw a read marble, your odds of getting 1 were 4/7

You are not replacing the marble. Your choice now is 3/6

now if there is 6 in all left than 2 marbles that are blue would be 1/3 or 33.33 in percent so it would be not likely