Calculate the probability

Calculate the probability

It is claimed
that Proactine, a new medicine for acne, is 75 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


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