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Suppose your upper drawer has 36 different socks: 12 are white, 10 are black, 6 are...

Suppose your upper drawer has 36 different socks: 12 are white, 10 are black, 6 are pink and 8 are blue. all the socks in the drawer are unpaired/lose. In the morning you pick 2 socks at random, one at a time. Draw a probability tree to calculate:
a) The probability of picking a black sock and a white sock
b) The probability of picking a pair of white socks
c) The probability of picking a blue sock GIVEN you already picked a black sock
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