Question

The probability that a patient recovers from a disease is 0.4. if 15 persons have such a disease, determine the probability that (a) 5 survive (b) at least 10 survive

Answer 1

probability of one patient =0.4
probability of 15 patient =6
a) probability of 5=5x0.4=2/6=1/3
b) probability of 10= 10x 0.4=4/6=2/3