Answer: 1120
Step-by-step explanation:
Given: Size of the population in the study = 1200
Also they revealed that 12 out of every 180 frogs in the population have spots on their back.
Thus we have fraction[tex]=\frac{12}{180}=\frac{3}{45}[/tex]
Hence, [tex]\frac{3}{45}[/tex] of total frogs have spots.
Now, [tex]\frac{3}{45}\ of\ 1200=\frac{3}{45}\times1200=80[/tex]
Therefore, 80 out of 1200 frogs in the population have spots.
Thus, the number of frogs in the population do not have spots = 1200-80=1120
