SOLUTION: Over a long period of time a certain drug has been effective in 75% of the cases in which it has been prescribed. If a doctor is now administering this drug to five patients, what

Algebra ->  Probability-and-statistics -> SOLUTION: Over a long period of time a certain drug has been effective in 75% of the cases in which it has been prescribed. If a doctor is now administering this drug to five patients, what      Log On

 

Hi,

Note: The probability of x successes in n trials is: 

P = nCx*  where p and q are the probabilities of success and failure respectively. 

In this case p= .75  & q = .25

nCx = 

P(3 out of 5) =  = .2637