My youngest brother and I have birthdays with a difference of 18 months and 14 days. While that’s not a mathematical marvel in any way it’s been interesting in finding pairs of famous people that either share exactly or are close to our birthdays.
The birthday problem asks for the probability that, in a set of n randomly chosen people, at least two will share a birthday. The birthday paradox refers to the counterintuitive fact that only 23 people are needed for that probability to exceed 50%. This isn’t representative of anyone having my exact birthday which is 1 in 365, but also my brothers birthday which is also 1 in 365. Combining those odds (1 in 133,225) and finding a pair of people considered famous or well-known in some way makes the odds out of this world.
Except the odds seem to favor our pairing, and thus the following…
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