Six people went into the woods to look for truffles. on average they collected 7 truffles per person. the average of the last four people to come back was 8 truffles per person. in fact the fourth person to come backk had 11 treuffles in is basket. how many truffles did the last three people collect altogether?

Given the question "six people went into the woods to look for truffles. On average they collected 7 truffles per person. The average of the last four people to come back was 8 truffles per person. In fact the fourth person to come backk had 11 treuffles in is basket. How many truffles did the last three people collect altogether?" Since the average truffles collected by the six people is 7, then the total truffles collected by the six people is 6 x 7 = 42 truffles. Since the last four people that came back collected an average of 8 truffles, then the total number of truffles collected by the last four people that came back is 4 x 8 = 32 truffles. Given that the fourth person collected 11 truffles, therefore, the last three people collected a total of 32 - 11 = 21 truffles.