Probability Object

It should return a time object and not change either time. In this case difference always returns positive values. For example, if you add 500 mintues (8 hours and 20 minutes) to 20:45 (8:45 PM), you should get 5:05 (5:05 AM). (8 hours + 20 hours i 28 hours = 4 hours, 45 minutes + 20 is 65 minutes is 5 minutes with a carried 1 to hours.) ................
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