Ryan decides to record the amount of time that he sleeps at night for five nights. The table shows the data. Night Amount of Time Slept
1 6 hours and 20 minutes
2 5 hours and 50 minutes
3 7 hours and 5 minutes
4 6 hours and 47 minutes
5 7 hours and 18 minutes

What is the average amount of time that Ryan slept for those five nights?

A.
6 hours and 48 minutes
B.
6 hours and 40 minutes
C.
6 hours and 56 minutes
D.
6 hours and 32 minutes
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The correct answer is  B. 6 hours and 40 minutes

Explanation:

The average of a group of values refers to the middle or "average" value of these. This mathematical factor can be calculated by adding all the values, in this case you need to dd the time Ryan slept each night, and then divide the total into the 5 nights.  Below, you can find the process.

1. First add all the hours

6 + 5 + 7 +  6 + 7= 31 hours

2. Add the minutes

20 + 50 +  5 + 47 +18 = 140 minutes

3. Divide the result of the minutes into 60 to convert part of these minutes to hours.

140 / 60 = 2.3333 - There are 2 hours in the total of minutes and 20 minutes (0.3333 x 60 minutes = 20 minutes)

4. Total of hours = 31 + 2 = 33 hours

   Total of minutes = 20 minutes

5. Divide the total into 5 days

33 hours 20 minutes = 5 days

33 / 5 = 6.6 hours that represent 6 hours and 36 minutes (0.6 x 60 = 36 minutes)

20 minutes / 5 days = 4 minutes

Total: 6 hours and 40 minutes (36 minutes + 4 minutes)