If 25% of the people <em>are</em> vaccinated, then 75% of the people are <em>not</em> vaccinated. Of those not vaccinated, each has a 50% chance of contracting the disease. The probability that someone is both not vaccinated and contracts the disease is (0.75)(0.5)=0.375.
The probability that someone is vaccinated and contracts the disease is (0.25)(0.1)=0.025 (it is multiplied by 0.1 because if the vaccine is 90% effective, then there is a 10% chance someone that is vaccinated can contract the disease.
Add these together for the total: 0.375+0.025=0.4
There is a 40% chance that someone chosen at random will contract the disease.
Answer:
38.62
Step-by-step explanation:
You can figure this out by converting these to a positive number, then subtracting the lower number from the higher number.
I
2/5 of 2.5. = 2x2.5 / 5x1 = 5/5 = 1 pound
Answer:
I would model and record finding the sum and difference of two rocks by calculating the weight and pound and it will be equal to the mass of that rock.
Step-by-step explanation:
