Saying 13 middos with a minyan

Question:

1. In order for the minyan to say 13 middot, does there actually have to be 10 people saying it or 10 people in the room is enough?
2. Is there a chiyuv for one to answer 13 middot if he is in the room?
3. A similar question, for the Aramaic parts of selichot, does there actually have to be 10 people saying it?
   Thank you

Answer:

1. The 13 middot are like other “devorim shebikidusha”, and should be said with a minyan. Even if not everyone is saying it, as long as they are listening and being part of it that is enough.
2. Just because you are in the room doesn’t mean you have to actually say it.
3. The aramaic parts definitely don’t need the 10 people to actually say it, as long as they are there

Sources:

S”A O”C 565-5,55-5 M”B 55-32,34, Igros Moshe O”C 3 89