Question

15 busses ply between Hyderabad and Tirupathi. The number of ways can a man go to Tirupathi from Hyderabad by a bus and return by a different bus is

• A. 15
• B. 150
• C. 210
• D. 225

Answer 1

The correct option is C 210

The number of ways in which a man travel from Hyderabad to Triupati is 15.
The number of ways come back to Hyderabad is one less than 15 i.e. 14.
The total number of ways =15 $\times$ 14 = 210