What percentage of invitees are likely to accept an invitation?

Question

I am hosting a BBQ three weeks hence. I only have so many seats but I know not everyone will accept the invitation. Statistically speaking, what percentage of people, on average, are likely to accept such an invitation so I can invite more people and end up filling all my seats?

Answer 1

statistically it depends on how u sent the invites.

the return depends on whether ugave them in person= higher rate of return

email or post.

also whether u really know the people  on a day to day basis on less frequent.

Answer 2

Wedding rules say 2/3.  I don't know if this applies to BBQs.