Pat and Corrine performed an experiment to find whether the soil in their garden was acidic or alkaline. They used a probe to measure a related chemical quantity, pH, at 11 places in the garden. They then entered the values in a
spreadsheet, as shown here.
What is the average of their 11 readings?
A)
6.54
B)
6.60
C)6.66
D)
6.72