Final answer:
To find out the number of people who saw the movie in the larger room, subtract the number of people who watched the movie in the smaller room from the total number who watched the larger room.
Step-by-step explanation:
To find out how many people saw the movie in the larger room, we need to subtract the number of people who watched the movie in the smaller room from the total number of people who watched the larger room.
So, 3562 - 1671 = 1891
Therefore, 1891 people saw the movie in the larger room.