| ▲ | fkyoureadthedoc 4 days ago |
| > a family has two children. You're told that at least one of them is a girl. What's the probability both are girls? +-----------+-----------+-----------+-----------+
| Boy | | Girl | |
| (0.5) | | (0.5) | |
+-----------+-----------+-----------+-----------+
| Boy-Boy | Boy-Girl | Girl-Boy | Girl-Girl |
| (0.25) | (0.25) | (0.25) | (0.25) |
+-----------+-----------+-----------+-----------+
Does this mean the probability that they are both boys is also 25% lol |
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| ▲ | randallsquared 4 days ago | parent [-] |
| That one is ruled out by the "at least one is a girl". |
| |
| ▲ | fkyoureadthedoc 4 days ago | parent [-] | | Well brother I'm looking at the table and it clearly says 25%. You may have been lied to about the at least one girl it seems. | | |
| ▲ | furyofantares 4 days ago | parent [-] | | The text directly above that table: > A simpler question > Let's image you're asked a simpler question. > A family has two children. What's the probability both are girls? | | |
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