BINOMIAL DISTRIBUTION HOW DO I ENTER THE BIONOMIAL DISTRIBUTION FORMULA INTO THE TI-30XIIS

Hello,
Let us start with a review of the formula for the binomial distribution
f(r;n,p)=n!/(r!(n-r)!)x(p^r)x(1-p)^(n-r)

But n!/(r!(n-r)!)=(nCr) you get
f(r;n,p)= (nCr)x(p^r)x(1-p)^(n-r)

Exemple : n=25, r=6, p=0.7

f(6;25,0.7)= 25 [PRB] [-->] 6 [ x ] {0.7[ ^] 6 }[ x ]{0.3[ ^ ]19}

The arrow means a horizontal scroll once to select the (nCr) function. [ x ] stands for the multiplication sign.
[ ^] is the raise to the power key
The { } are used here as parentheses to make formula legible.

Hoe it helps

Hope it helps

Hope it helps.

Five items are selected at random from a production line. Whiat is the probability of selecting exactly two defectives if it is known that the probability of a defective item from this production system is 0.05?

P(2)= 5! 0.05^2(1 - 0.05)^5-2
2!(5-2)!