I have no idea if this is right....

for a i get .021%

for b i get 3

for c i get 24.38%

please help asap!

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- April 26th 2006, 04:37 PMArbiturProbability Distribution
I have no idea if this is right....

for a i get .021%

for b i get 3

for c i get 24.38%

please help asap! - April 26th 2006, 07:28 PMThePerfectHacker
Let me remind the binomial probability formula, an event out of times exactly with probability is,

.

Over here

Thus,

- April 26th 2006, 07:32 PMThePerfectHacker
For the second you need to find such as,

is maximized.

Basic trail and error, you get,

- April 26th 2006, 07:44 PMThePerfectHacker
For the third to first.

You need to find, (m=3,4,5,....,20) because "at least"

...

You can add them up but that is the n00bish way of doing this problem. It is easier to find,

Now from one subtract that to get,