binomial distribution density
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last updated: 2004-05-01 |

where is
called the
binomial coefficient ' N over n', what stands for the number of combinations
when taking n objects out a collection of N objects.
The formula is an abbreviation of:

Suppose that an event has a probability p to occur. Examples of such events
are 'heads
or tails', and the chance on a certain number on a dice. The binomial distribution gives the
probability of n successes for a number of N events.
When p=1/2, we find the binomial:

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