Should it be Mrs and Mr Or Mr and Mrs?
Mr. and Mrs. (ex. "Hello, Mr. and Mrs. Evans" instead of "Hello, Mrs. and Mr. Evans")
For High School graduation invitations for couples should one address the envelope with first names or Mr and Mrs?
* For High School Graduation invitations for couples it should be Mr. & Mrs., but, if the two people are living together you could address the envelope to: Mr. Jack Smith and Ms. Jane Doe. Even if they are younger friends or young relatives in your family there should always be a Mr. or Ms. in front of the name.
Mr and mrs smith are in line with ten other people in how many ways can these 12 people be arranged in this line so that mr and mrs smith are not together?
In all there are 12 ! ways. If Mr and Mrs S are treated as a single unit, then there are 11! ways of arranging the 10 other people with Mr and Mrs S together. But these can be Mr-Mrs or Mrs-Mr so, in fact, there are 2*11! ways in which Mr and Mrs S are together. So the number of ways in which they are NOT together is 12! - 2*11! = 399,168,000
If it's a reply to a wedding intivation, one traditionally writes in longhand, with these line breaks (I hope they come thru) Mr. and Mrs. Jones accept with pleasure the kind invitation of Mr. and Mrs. Smith To decline an invitation, Mr. and Mrs. Jones regret exceedingly the kind invitation of Mr. and Mrs. Smith.