Use the binomial theorem for these problems,
In your case n = 18 & p= 0.6
I don't think your attempt for part a) is very robust.
Hello people I have this problem to solve.
The probability that a patient recovers from a rare blood disease is 0.6. If 18 people are known to have contracted this disease, what is the probability that:
(i) at least 15 survive?
(ii) from 5 to 10 survive?
(iii) Exactly 12 survive?
(I have attempted the first part not sure if it is correct. Really appreciate replys in regads to the answer).