the probability that a patient recovers from a delicate heart operation is 0.9 . what is the probablity that exactly 5 othe next 7 patients having this operation survive

Question

reemii · Answer

What is the general structure of that experience?
- An experience, with 0.9 success probability, is ` repeated ` 7 times
- You want the probability that the ` number of successes is exactly equal to ` 5

The answer for this question is to use a Binomial distribution with parameters $n=7$ and $p=0.9 $. Can you write the formula down?

khanjee · Answer

C(7,5) (0.9)^5(0.1)^2 = 0.124

mathmale · Answer

This is binomial probability.  Either a patient survives or does not survive.  The probability of recovery is given and is p=0.9.  The numer of trials, n, is 7.  

What is P(5) under these circumstances?  

Are you calculating binomial probability with a calculator, a formula, or a table?  Could you please share one or two problems of this kind that you have already done?