A hall has 12 gates. In how many ways can a man enter the hall through one gate and come out through a different gate?

144

No worries! We‘ve got your back. Try BYJU‘S free classes today!

132

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

121

No worries! We‘ve got your back. Try BYJU‘S free classes today!

156

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A $132$
The person can enter the hall in 12 gates and exit from any of the other 11 gates.
Hence the total number of ways $= 12 \times 11 = 132$

Suggest Corrections

Similar questions

A circular hall has six doors. In how many ways can a lady dancer enter the hall through one door and leave it through a different door?

A room has 8 doors. In how many ways, a man can enter in the room through one door and exit through a different door?

5

Join BYJU'S Learning Program