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# : 1_Peruutations any arrans ement of a set n objects in agivers is called permntation - PowerPoint PPT Presentation

: 1_Peruutations any arrans ement of a set n objects in agivers is called permntation of the obseative (taken all ab time , donb repeat dement P( n,r )=n1/(n-r)! P( n,r )= number of permmtations , n= objects R= taken at time . Example :

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:1_Peruutations

any arransement of a set n objects in

agivers is called permntation

of the obseative

(taken all ab time ,donb repeat dement

P(n,r)=n1/(n-r)!

P(n,r)= number of permmtations ,

n= objects

R= taken at time

How many different ways to select 4 different players from 10 players on ateam to play fonr tennis mataches(data repeat plyer)

Solution :

n-combination elements of a set is an unordered selction of relements from the set thes ,an n-_combinations is simply asub set of the set with relement

C(n,r)=n!/r!(n-r)!

How many ways are there to select s player from 10 members tennis team to mekeatrip to match at amother school?

Solution :

If n=11 ,r=6 , fine the follow

1-Peruutations

2-combination

:Solution

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سارهعبدالله..

تهاني محمد..

بشايرناصر..

منال محمد ..

هيفاء محمد..