© UCLES 2020
Problem Solving
Key: D
Justification
The total number of working hours per doctor per day is 7.5 hours (8 hours between 09:00
and 17:00, minus 30 minutes for the lunch break).
Each hour can accommodate 4 appointments (60/15) therefore 30 appointments can be
made in 7hours 30 minutes (7x4 + 2x15).
There are four doctors working at the surgery, therefore the number of appointments per day
is 120 (4x30)
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