Answer:
[tex]f_r=0.45\hspace{3}or\hspace{3}45\%[/tex]
Step-by-step explanation:
The relative frequency is the result of dividing the absolute frequency of a given value by the total number of data:
[tex]f_r=\frac{f_a}{N}[/tex]
Where:
[tex]f_r=Relative\hspace{3}frequency\\f_a=Absolute\hspace{3}frequency\\N=Total\hspace{3}number\hspace{3}of\hspace{3}data[/tex]
The absolute frequency is the number of times a value appears, so in this case:
[tex]f_a=9[/tex]
if the coin is flipped 20 times then:
[tex]N=20[/tex]
Therefore:
[tex]f_r=\frac{9}{20} =0.45[/tex]
You can also express the result as a percentage multiplying by 100:
[tex]\%f_r=0.45*100=45\%[/tex]
