Refer to the below data table and answer the following question.
Sleep Category Percentage (%)
Deep Sleep 15
Dreaming 20
Light sleep 10
Extremely light sleep 15
Awake 40
Between 10 pm to 6 am, a fitness band records the data above. How long was the user in Light sleep or was Awake?
- A2.5 hours
- B3.5 hours
- C4 hours
- D4.5 hours
Solution & Step-by-step Explanation
First, find the total duration from 10 pm to 6 am:
Total Time=8 hours
The percentage of time spent in "Light sleep" or "Awake" combined is:
Combined Percentage=10% (Light sleep)+40% (Awake)=50%
Now, calculate 50% of the total duration:
Duration=50% of 8 hours=
100
50
×8=4 hours
Total Time=8 hours
The percentage of time spent in "Light sleep" or "Awake" combined is:
Combined Percentage=10% (Light sleep)+40% (Awake)=50%
Now, calculate 50% of the total duration:
Duration=50% of 8 hours=
100
50
×8=4 hours