Question about Texas Instruments TI 30XIIS Scientific Calculator

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I can't figure out how to multiply a number by pi on my TI-30xs multiview...I tried the obvious to no avail

I tried parenthesis around the number and the regular *...My teacher couldn't even figure it out!

Posted by Anonymous on

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Posted on Jan 02, 2017

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SOURCE: how do i enter the formula into my calc for a

Hello,
This is for the TI-30 XIIS. It should work for you once you find the (nCr) key or the menu item under PRB key. If you know the formula skip to Exemple

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.

Hope it helps

Posted on Oct 09, 2009

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SOURCE: how do I get H3O

The calculation is not difficult:
mib8888_44.gif

To solve your example on the TI-30XS, key in:

mib8888_45.gif

And get the result (rounded to three digits),
mib8888_46.gif

Posted on Mar 04, 2011

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I'm having troubles with parentheses. How can I enter: 2-(-2) ?


Most likely you're having troubles with the negative sign, not the parenthesis.

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1 Answer

Dividing by a negative exponent


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