You can ignore the odds of the first person being born on a given day a that is basically free choice. (Although I will put as 1/1 here to show working. The second person being born on the same day is just 1/7 Additional people born on the same day are 1/7 So to get the compound odds you multiply all the fractions together. 1/1 × 1/7 × 1/7 × 1/7 = 1/343 = 0.292%

Doing math in my head I come to roughly 6% chance. I'm probably 100% wrong but it was a thought out "guess". It went something like 4 ppl, 7 days a week. 7 x 4 =28. 28. Flip to 82 (because) 8 - 2 =6. So 6% or so. You're welcome.

General Discussion Thread

You can ignore the odds of the first person being born on a given day a that is basically free choice. (Although I will put as 1/1 here to show working. The second person being born on the same day is just 1/7 Additional people born on the same day are 1/7 So to get the compound odds you multiply all the fractions together. 1/1 × 1/7 × 1/7 × 1/7 = 1/343 = 0.292%

Awesome, thanks!

Doing math in my head I come to roughly 6% chance. I'm probably 100% wrong but it was a thought out "guess". It went something like 4 ppl, 7 days a week. 7 x 4 =28. 28. Flip to 82 (because) 8 - 2 =6. So 6% or so. You're welcome.