правильный ответ на вчерашнее задание - 1й. The group consisted OF ten people.
consist OF - состоять из....
consist IN - заключаться в...
Something that consists of particular things or people is formed from them.
Breakfast consisted of porridge served with butter.
Something that consists in something else has that thing as its main or only part.
His work as a consultant consisted in advising foreign companies on the siting of new factories.