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wiki:donuts:winter2015:blackcards:answer
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wiki:donuts:winter2015:blackcards:answer [2015/02/04 14:58] jmb438 created |
wiki:donuts:winter2015:blackcards:answer [2015/02/25 11:06] (current) jmb438 |
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| Number the black cards 1-3. The black cards numbered 1 and 2 are in pile together, and card number 3 is in the pile with the red card. You know that your pile has one black card on top, so the possible combinations are | Number the black cards 1-3. The black cards numbered 1 and 2 are in pile together, and card number 3 is in the pile with the red card. You know that your pile has one black card on top, so the possible combinations are | ||
| - | | B<sub>1</sub> | B<sub>2</sub> | B<sub>3</sub> | | + | | B<sub>1</sub> | B<sub>2</sub> | B<sub>3</sub> | |
| - | | B<sub>2</sub> | B<sub>1</sub> | R | | + | | B<sub>2</sub> | B<sub>1</sub> | R | |
| With three total outcomes, two of them have a black card on bottom. The probability of the bottom card being black is 2/3. | With three total outcomes, two of them have a black card on bottom. The probability of the bottom card being black is 2/3. | ||
wiki/donuts/winter2015/blackcards/answer.1423087112.txt.gz · Last modified: 2015/02/04 14:58 by jmb438