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: 1_Peruutations any arrans ement of a set n objects in agivers is called permntation

: 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 arrans ement of a set n objects in agivers is called permntation

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  1. :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

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

  3. 2_combinations: 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)!

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

  5. Example:: If n=11 ,r=6 , fine the follow 1-Peruutations 2-combination :Solution

  6. عمل الطالبات: سارهعبدالله.. تهاني محمد.. بشايرناصر.. منال محمد .. هيفاء محمد..

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