10 marbles what is the probability of drawing 2 blue marbles if the first marble is placed back in the bag before the second draw

Complete Question:

There are 10 marbles. What is the probability of drawing 2 blue marbles if the first marble is NOT placed back in the bag before the second draw.

2 yellow, 3 pink, 5 blue    

Step-by-step explanation:

Given

When the first blue marble is selected, the probability is:

Since the first marble is not returned, we have the following marbles left

The probability of picking a second blue marble is:

So, the required probability is:

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