Answer:
2.25%
Explanation:
To answer the question, you meet to first need to determine the probability of drawing a blue card once.
So, there are 3 blue cards out of a total of 20, the probability is 3/20 or 0.15.
Thus, the probability that both cards drawn are blue is:
(3/20) x (3/20)
= 0.0225 or 2.25%.
Therefore the answer to your question is, 2.25%