Answer:
The mean distance that Andrew runs per day is 4. 79 miles.
Explanation:
Distance Covered on Monday = 3 miles
Distance Covered on Tuesday = 4.6 miles
Distance Covered on Thursday = 6.76 miles
Distance Covered on Saturday = 4.6 miles
Now, 
Average Distance = 

Average mean distance = 
 = 4.79 miles
Hence, mean distance that Andrew runs per day is 4. 79 miles.