buses operate 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
Correct Answer: Option(c)
Solution: While going ,number of ways to choose bus out of is .
While return trip, in order to come with different bus, number of buses left .
Number of ways to choose bus for return trip
So, the required number of ways for going and return