5 A room has 7 doors. In how many ways can a man enter the roomthrough

1.	5 A room has 7 doors. In how many ways can a man enter the roomthrough one door and come out through a different door?
Answer» SInce, there are 7 ways of entering into the room. Therefore after entering into the room, the man come out through a different gate in6 ways. Hence, by the fundamental principle of multiplication, total number of ways is 7*6 = 42 ways

5 A room has 7 doors. In how many ways can a man enter the roomthrough one door and come out through a different door?

Answer»

SInce, there are 7 ways of entering into the room. Therefore after entering into the room, the man come out through a different gate in6 ways.

Hence, by the fundamental principle of multiplication, total number of ways is 7*6 = 42 ways