Question: - if possible include procedure - An urn contains 3 black balls and 4 white balls. Two are drawn at random from the box one

- if possible include procedure - An urn contains 3 black balls and 4 white balls. Two are drawn at random from the box one by one and without replacement. What is the probability that:

a) both balls are black?

b) the second ball is black?

c) only one of the two balls is black? d) ANSWER parts a)-c) if two balls are drawn from the urn one by one and with replacement.

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