Julian and Brittany mailed 275 wedding invitations to family and friends and predicted that they would all attend

That's great to hear!

Step 1: Start with the total number of wedding invitations sent

Julian and Brittany mailed 275 wedding invitations.

Step 2: Calculate the total number of guests expected to attend
They predicted that everyone invited would attend.

Therefore, the total number of guests expected to attend is also 275.

To find out the number of people attending the wedding, we first need to determine how many invitations were actually accepted. Without that information, we cannot accurately predict the number of attendees. However, if we assume that all 275 invitations were accepted and every recipient will attend the wedding, then the number of attendees would be 275. It's important to note that in reality, the actual number of attendees may vary, as some invitees may decline or not be able to attend for various reasons.