This year, 70% oft he population have been immunised against a certain disease. Records indicate tat an immunised person has a 5% chance of contracting the disease whereas for a non- immunised person this figure is 60%. Calculate the overall percentage of the population who are expected to contract the disase.
(answer is 21.5%) please show working for 10 pts
(answer is 21.5%) please show working for 10 pts
-
using the law of total probabilty,
Pr = 0.7*0.05 + 0.3*0.6 = 0.215 or 21.5% <---------
Pr = 0.7*0.05 + 0.3*0.6 = 0.215 or 21.5% <---------