Show that a Binomial (n,p) random variable is a sum of n iid Bernoulli (p) random variables???

plz help wit dis...

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- March 30th 2010, 06:39 PMamul28Random variables
Show that a Binomial (n,p) random variable is a sum of n iid Bernoulli (p) random variables???

plz help wit dis... - March 30th 2010, 07:42 PMAnonymous1
Ok, on one condition... Never say "plz help wit dis..." again.

Bernoulli's have mass function for

Now, Binomial has mass function for

i.e.,

What are you starting to see?

Wait I thought of an easier way to explain this... - March 30th 2010, 08:00 PMAnonymous1
Apply the Binomial theorem.

Sorry I just got really lazy. I've been doing straight math since 9am and have been posting here on my free time. Overdose. - March 30th 2010, 11:50 PMamul28
surely

thank u.....

ill try