A new drug has been developed that is found to relieve nasal congestion in 90 percent of those with the condition. The new drug is administered to 300 patients with this condition. What is the probability that more than 265 patients will be relieved of the nasal congestion?
90 percent are guaranteed to 270 are free.
P(x>265)
=sum of 300Cx *(0.9)^x *0.1(^(300-x) for x from 265 to 300
Can someone explains this to me?