Answer:
The relative frequency of mammals in the survey is 30%.
Step-by-step explanation:
Relative frequency is the ratio of the occurrence of a singular event and the total number of outcome
Amphibians Insects Fish Reptiles Birds Mammals
12 30 9 25 22 42
Relative frequency = [tex]= \frac{\text{ (number of trials that are successful)}}{\text{(total number of trials)}}[/tex]
Total number of wildlife animals = 12+ 30 +9 +25+22+42 = 140
Now the relative frequency of mammals in the survey = [tex]\frac{\text{total number of mammals}}{\text{ Total number of animals}}[/tex]
the relative frequency of mammals in the survey =[tex]\frac{42}{140}[/tex] = 0.3
Converting into percentage , we get
=[tex]0.3 \times 100[/tex]
= 30 %
