Exercise

# Average trip time

W20529 took 291 trips in our data set. How long were the trips on average? We can use the built-in Python functions `sum()`

and `len()`

to make this calculation.

Based on your last coding exercise, the data has been loaded as `onebike_durations`

. Each entry is a number of seconds that the bike was out of the dock.

Instructions

**100 XP**

- Calculate
`total_elapsed_time`

across all trips in`onebike_durations`

. - Calculate
`number_of_trips`

for`onebike_durations`

. - Divide
`total_elapsed_time`

by`number_of_trips`

to get the average trip length.