3 ms·
> a family has two children. You're told that at least one of them is a girl. What's the probability both are girls? +-----------+-----------+-----------+-
by fkyoureadthedoc 1y 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
- randallsquared 1y agoThat one is ruled out by the "at least one is a girl".
- fkyoureadthedoc 1y agoWell 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 1y agoThe 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?
- fkyoureadthedoc 1y agoUnder the 1 child policy, probably slim U+1F614