NO.PZ2015120604000042
问题如下：
Given the following frequency distribution
According to the above table, calculate the sample size.
选项：
A.4.
B.6.
C.14.
解释：
C is correct
In order to get the answer,we should sum of all of the frequencies 1 + 6 + 4 + 3 = 14.
看得明白表，但看不懂问的是什么
