A bus traveled 120 mi in 2.5 h. After picking up new passengers, it traveled another 105 mi in 2 h.

What was the average speed of the bus for the entire trip?

Round to the nearest hundredth, if necessary.

48.00 mi/hmi/h

50.00 ​ mi/hmi/h ​

50.25 ​ mi/hmi/h ​

52.50 ​ mi/hmi/h ​