I am trying to do a binomial experiment and I can't for the love of god remember how to calculate for nCx (nCx*P^X*Q^n-x) I think I can use the button ! but when I try to do 12!3 it doesn't work.

This is a scientific calculator that can perform many operations on numbers but not on letter symbols. It does not have a Computer Algebra System.

Use the quadratic formula, or factor the quadratic polynomial. Once factored into a product of two first degree binomials, the roots are obtained by setting (in TURN) each binomial factor equal to zero.

The only known equation for the cumulative binomial distribution is the sum of the individual binomial probabilities. Some more sophisticated (and more expensive) calculators have that equation built in, but the 30xii does not.

If n>30 and n*p>5 and n*(1-p)>5 then you can approximate the cumulative binomial with the normal probability function, but again the 30xii does not have that built in.

Do you have a question about the binomial probability distribution function or the binomial cumulative distribution function?

See cap images below

See explanation on captured image below. Result in your case is 0.161

I encountered this same problem with the TI-84. Turns out you have to put your P (Percentage) as out of one hundred. For example. With my problem I had;

Trails: 13
P: 53/100
X Value: L1 (List 1)

And then it posted my probabilities to the L2 list. For some reason if you just put 53, or whatever your percentage of success in, it won't calculate.

I think this link will be helpful.http://www.sparknotes.com/math/algebra2/polynomials/section2.rhtml

Hello,

Sorry, but you information is wrong, to find the binomial distribution use the PROB menu not the STAT menu. Its name is randBi
[2nd][MATH][F2:PROB] scroll right.
Hope it helps.

Go to this page.
http://www.elderlab.yorku.ca/~aaron/Stats2022/BinomialDistribution.htm