Step 1: Understanding the Routes and their DistancesFirst, we list the routes and their distances:
Route 1: City Centre – Market Square – Songbird Park – City Centre (3 miles)
Route 2: City Centre – Laurel Lane – Market Square – City Centre (3 miles)
Route 3: City Centre – City Hall – Laurel Lane – City Centre (3 miles)
Route 4: City Centre – City Hall – Market Square – Laurel Lane – City Centre (4 miles)
Route 5: City Centre – Songbird Park – Market Square – Laurel Lane – City Centre (4 miles)
Step 2: Determine Possible Route Combinations for 10 MilesThe runner must run routes that add up to 10 miles each day. We need to check which combinations are possible:
3 + 3 + 4 = 104 + 3 + 3 = 10Step 3: Determine Frequency of Running towards the City CentreEach route starts and ends at the City Centre. Therefore, each route involves running towards the City Centre twice: once at the start and once at the end. Let's calculate the total number of runs towards the City Centre over a 3-day period.
Each day, the runner runs three routes:
Each route involves two runs towards the City Centre (start and end).
Therefore, for three routes in one day:
3 routes×2 runs towards City Centre per route=6 runs towards City Centre per day
Over a 3-day period:
6 runs per day×3 days=18 runs towards City Centre in 3 days
However, since she always returns to the City Centre, we need to count unique routes. Given three unique routes per day over three days (and she does not avoid any route more than two days in a row):
She would run towards the City Centre every time.
Therefore, the total number of times she heads towards the City Centre over 3 days is: 3×3×2=18
Step 4: Determine Frequency of Running towards Laurel LaneNow, let's count the number of times the runner will run towards Laurel Lane. The routes that involve running towards Laurel Lane are:
Route 2 (once)
Route 3 (once)
Route 4 (once)
Route 5 (once)
Over a 3-day period, she runs three routes per day, never avoids a route for more than two days, and doesn't repeat the same route more than two days in a row. Therefore, the maximum combinations for 3 days:
Since she runs each route not more than twice and covers all routes, the combination must follow the rule of 10 miles.
Routes to Laurel Lane:
If she runs Route 2 or Route 3 or Route 4, and Route 5:
Assuming a combination of 3+3+4 (ensuring all), she runs towards Laurel Lane:
For 3 days, includes all combinations 3+3+4 and repeat next day 4+3+3, ensuring each route twice.
Hence 3 days all inclusive,
Therefore, the total number of times she runs towards Laurel Lane in any 3-day period:
[ ( 3+3+4 ) or vice versa ensuring 6 times.]
For City Centre:18
For Laurel Lane:6
Hence, the correct selections are:
City Centre: 9
Laurel Lane: 6