Random Notes  Sandbox

https://twitter.com/jinji_990/status/1627057115083771904

100 total, 90 heads, 10 tails.

take random 10, and assume X of 10 are heads.

two groups are 90 and 10.

X in 10 are heads, i.e. (10X) are tails.

90 has (90 X) heads, i.e. X are tails.

→ if we flip them all!?!?

(90 X) tails, i.e. X are heads.


