percent of 11P:
11 P +(500% of 11P)=11P +5(11P)= 66P
The population at the end of the nineteenth century is 66P. That’s 65P more
than the original population P:
The net increase is 6,500 percent, and the answer is (E).
AVERAGES
Another classic situation with a standard approach is an averages question
like Example 7.
AVERAGE, MEDIAN, AND MODE
Median = middle value (or average of two middle values) Mode = most
frequent value; if there are two numbers that occur with equal
frequency there can be two modes