tiago 3d ago

I have a fun math coincidence on my family: every year the birthday for both my parents and I is on the same weekday. All of them is past February, so this is always true.

What's the probability of this happening?
Is it as simple as P(x) = 1/7*1/7*1/7 or do we take anything in consideration to properly calculate the probability? #math #mathhelp #fedihelp #probability #hivemind

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@tiago
No, that's the probability that you all have your birthday on a particular day of the week. It doesn't matter which day your birthday is on, so it's just the chance that they both have it on the same day as you, which is 1/7x1/7
Apr 5 at 9:12pmWeb