Final answer:
To calculate the mortality rate in units of deaths per 100,000 people, divide the number of deaths by the population size and then multiply by 100,000. In this case, the correct answer is 0.249 per 100,000.
Step-by-step explanation:
To calculate the mortality rate in units of deaths per 100,000 people, we need to divide the number of deaths by the population size and then multiply by 100,000. In this case, the number of deaths is 783,750 and the population is 315 million, so the equation looks like this:
Mortality Rate = (Number of Deaths / Population) x 100,000
Mortality Rate = (783,750 / 315,000,000) x 100,000 = 0.249 per 100,000
Therefore, the correct answer is c) 0.249 per 100,000.