Five marbles are drawn from a bag which contains 7 blue marbles and 4 black marbles. What is the probability that:  (i)all will be blue? (ii)3 will be blue and 2 black?

Explanation

To solve the problem of finding the probability of drawing marbles from a bag containing 7 blue marbles and 4 black marbles, we will break it down into two parts as stated in the question.

### Given:
- Total blue marbles = 7
- Total black marbles = 4
- Total marbles = 7 + 4 = 11
- Number of marbles drawn = 5

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