Failure Rate From Counts

Problem

Estimate the failure rate from failures observed over total_time units of operation:

rate = failures / total_time.

Return 0.0 when total_time <= 0.

Hint

For exponential lifetimes the failure rate is the reciprocal of the MTBF.

case 1

in: [3,1000]

expected: 0.003

case 2

in: [0,500]

expected: 0

case 3

in: [7,2]

expected: 3.5

case 4

in: [0,0]

expected: 0

Starter codePython

def failure_rate_from_counts(failures, total_time):
    # Your code here
    pass

4 test cases · run your code against them in the editor