# Where is the combination button on SHARP EL-501W calculator?

I am trying to do combinations on my calculator, but I can't find a button to do nCr problems.

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There is no such key on this calculator. You can calculate it using factorials. To calculate nCr you can calculate n! / (r! * (n-r)!).

Posted on Apr 30, 2012

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Posted on Jan 02, 2017

Hello,
Use the sequence [2ndF][nPr] for permutations and [2ndF][nCr] for combinations.
Exemples: 10(nPr)3 is entered as 10[2ndF][nPr]3 [=] gives 720
5(nCr)2 is entered as 5 [2ndF][nCr] 2 [=] gives 10

Hope it helps.

Posted on Sep 17, 2009

http://www.sharpusa.com/products/support/view_all_models/0,2326,32,00.html
I don't see that model listed...are you positive on exact model number?

Posted on Sep 05, 2009

SOURCE: user's manual Sharp EL-531WH

Posted on Aug 10, 2007

Hi,
The source of errors is most certainly due to the wrong schoice of angle unit (degree or radian). If the default angle unit set in your calculator is the degree, any value fed to the trigonometric functions (sin, cos, tan) is considered to be expressed in degrees. Consequently, if you calculate the arctangent ( tan^-1) of a value, the angle returend by that inverse trigonometric function is expressed implicitly in degrees.

Similarly if radian is the default angle unit in your calculator, any angle returned by an inverse trigonometric function (arcos, arcsin, arctan) is in radian.

Set the default angle unit as the one required by your problem at hand. This way, the angles returned will be in the right unit and you will not have a problem of interpretation.

Hope it helps.

Posted on Dec 07, 2009

Here, I think I got you a link.

Posted on Jan 30, 2010

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### How calculate degree in this calculator?

To set the angle unit to degree, you proceed as follows.
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a

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### Hi, I just bought a calculator model# EL-501W ( by SHARP) and i can't figure out how to plug in #'s in scientific notation? Can you please give me instructions on how to do that??

Without knowing the specific type of scientific notation you are trying to enter, there is no way to give you accurate information. Here is where you can download the manual from...

http://www.usersmanualguide.com/sharp/calculator/el-501w

if you provide additional information, perhaps I can provide a more detailed answer.

Good luck.

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### I want to calculate permutation and combination.

Hello,
Use the sequence [2ndF][nPr] for permutations and [2ndF][nCr] for combinations.
Exemples: 10(nPr)3 is entered as 10[2ndF][nPr]3 [=] gives 720
5(nCr)2 is entered as 5 [2ndF][nCr] 2 [=] gives 10

Hope it helps.

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