There are six doors in a room. four boys have to come. in how many ways they can come in the room from difterent doors. 98. (1 10 (2 60 13) 24 (4) 360

The correct answer is (4) 360. Think about it this way. We have 6 doors and we have to pick 4 out of them, and the order of arrangement matters here. So we calculate the permutati...