Evaluate the following :-
1)^5P3 2)^10P4

Question

Evaluate the following :- 
1)^5P3 2)^10P4

uri · Answer

@terenzreignz Dafuq type of ques is this!

terenzreignz · Answer

hehe it won't make sense unless you read through the entire text :D

uri · Answer

you know what this is,how to do this?

terenzreignz · Answer

of course :)
But if I just explain it outright, it won't make sense yet.

Let's translate 
$$\Large _nP_r$$

in English first, shall we?

uri · Answer

Ohkay first explain me this,then the real ques.

terenzreignz · Answer

This is what's called a permutation.

uri · Answer

wait you have written n down...but it's actually up lol

terenzreignz · Answer

like this:
$$\Large ^nP_r$$

In our textbooks it's down, like the r...

uri · Answer

Yes like this the *5* is up :D

terenzreignz · Answer

anyway, you have to understand what it means first.

Say, you have a question...
You have five students, and three chairs in a row.

How many ways can three students (from the five) be arranged on the three chairs?

nincompoop · Answer

math type it's not rendering properly on my screen

uri · Answer

Lol they will sit on each other? @terenzreignz

terenzreignz · Answer

no, only three students are picked, two are not.

terenzreignz · Answer

Okay, here's another way to look at it...
from the digits
1,2,3,4, and 5
how many three digit numbers may be formed?

uri · Answer

SO like there are three chairs three students,they can just sit..o_O

nincompoop · Answer

you need a demonstration!

terenzreignz · Answer

Yeah... numbers...
1  2  3  4  5

How many three digit numbers may be formed using these five digits?

uri · Answer

3?

nincompoop · Answer

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