Doctors

The drug successfully treats 90% of cases. Calculate the probability that it will cure at least 18 patients out of 20.

Correct answer:

P =  67.6927 %

Step-by-step explanation:

p=90%=10090=109=0.9  p18=(1820)p18(1p)2018=(1820)0.918(10.9)2018=1900.9180.120.2852  p19=(1920)p19(1p)2019=(1920)0.919(10.9)2019=200.9190.110.2702  p20=(2020)p20(1p)2020=(2020)0.920(10.9)2020=10.9200.100.1216  P=100 (p18+p19+p20)=100 (0.2852+0.2702+0.1216)=67.6927%



Did you find an error or inaccuracy? Feel free to write us. Thank you!







Tips for related online calculators
Looking for a statistical calculator?
Our percentage calculator will help you quickly calculate various typical tasks with percentages.
Would you like to compute the count of combinations?

You need to know the following knowledge to solve this word math problem:

Related math problems and questions: