Problema Solution
It is claimed that Proactine, a new medicine for acne, is 60 percent effective. It is applied to the affected area of a group of 15 people. Calculate the probability for the following (Round your answers to 3 decimal places):
(a) All 15 will show significant improvement
Probability
(b) Fewer than 9 of 15 will show significant improvement
Probability
(c) That 12 or more people will show significant improvement
Probability
Answer provided by our tutors
a) = 15/15 or 1 because the whole slot was effective
b) 8/15 as it is all less than 9th person
c) 4/15 becasue as it includes 12th+ 13+14+15th person