Statistics A box contains 3 white balls and 2 black balls Tw

Statistics

A box contains 3 white balls and 2 black balls. Two balls arc drawn without replacement. What is the probability that the second ball is black given that the first is black?

Solution

If the first was black, then only 1 black ball remains, and 3 white balls.

So, there\'s 1 balck out of 4 balls.

Thus,

P(second is black|1st is black) = 1/4 or 0.25 [answer]