A frequency table of grades has five classes (a, b, c, d, f) with frequencies of 44 , 1515 , 1818 , 66 , and 11 respectively. what are the relative frequencies of the five classes?

Refer to the histogram shown below.

Total frequency = 44 + 1515 + 1818 + 66 + 11 = 3454.

Calculate relative frequencies, to the nearest thousandth.

Class a:

44/3454 = 0.0127

Answer: 0.013

Class b:

1515/3454 = 0.4386

Answer: 0.439

Class c:

1818/3454 = 0.5263

Answer: 0.526

Class d:

66/3454 = 0.0191

Answer: 0.019

Class f:

11/3454 = 0.0032

Answer: 0.003