Answer:
7/12
Step-by-step explanation:
I gave all of the fractions a common denominator:
1/6= 2/12
5/12= 5/12
1/4= 3/12
1/6= 2/12
Then, I added the 2/12 (from 0-1 hours) and 5/12 (from 1 1/2-2 hours). THis will give the complete range of 0-2 hours.
Hope this helps!