Combinations and Permutations Combinations and Permutations

Combinations and PermutationsCombinations and Permutations

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Permutation and combination related questions are common in PSC and Bank exams.

Before going to Combinations and Permutations, first lean about factorial.

If \'n\' is a positive integer then, factorial of n is denoted as n!.

5! = ( 1 x 2 x 3 x 4 x 5 ) = 120

4! = (1 x 2 x 3 x 4 ) = 24

Permutations are for lists of items, whose order matters and combinations are for group of items where order doesn’t matter. in other words,

  • When the order of items doesn\'t matter, it is called as Combination.
  • When the order of items does matter it is called as Permutation.

The number of permutations of n objects taken r at a time is determined by using this formula:


Permutation: Listing your 3 favourite football team in order, from list of 10 teams. P(10,3) = 720.

The number of combinations of n objects taken r at a time is determined by using this formula:


Combination: Picking a team of 3 people from a football coaching group of 10. C(10,3) = 10!(3!(10−3)!) = 120.

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Questions About Human Brain


അക്ഷരങ്ങളെ തിരിച്ചറിയാൻ സാധിക്കാത്ത രോഗാവസ്ഥ ഡെസ്‌ലേഷ്യ .
ഐച്ഛിക പ്രവർത്തനങ്ങളെ നിയന്ത്രിക്കുന്ന തലച്ചോറിലെ ഭാഗം മെഡലാ ഒബ്ലോംഗേറ്റ .
ചുമ, തുമ്മൽ, ഛർദി തുടങ്ങിയവയെ നിയന്ത്രിക്കുന്ന തലച്ചോറിലെ ഭാഗം മെഡലാ ഒബ്ലോംഗേറ്റ .
ജ്ഞാനേന്ദ്രിയങ്ങളുമായി ബന്ധപ്പെട്ട തലച്ചോറിലെ ഭാഗം സെറിബ്രം .
തലച്ചോറിനെ കുറിച്ചുള്ള പഠനം ഫ്രിനോളജി .
തലച്ചോറിനെ സംരക്ഷിക്കു...


Kerala Film Awards 2019 Winners


The 49th Kerala State Film Awards presented by the Kerala State Chalachitra Academy were announced by the Minister for Cultural Affairs, A. K. Balan in Thiruvananthapuram on 27 February 2019. Here is the list of the winners in Kerala State Film Awards of 2019 .

Best Film – Kanthan: The Lover of Color.
Second Best Film – Oru Njayarazhcha.
Best Actor – Jayasurya (Captain and Njan Marykutty) and Soubin Shahir (Sudani from Nigeria).
Best Actress – Nimisha Sajayan, Chola and Oru Kuprasidha Payyan.
Best Director – Shyamaprasad, Oru Njayarazhcha.
Best Character Actor – Joju George, Chola and Joseph.
Best Character Actress – Savithra Sreedharan and Sarasa Balussery, Sudani from Nigeria.
Best Child Artist – Female – Abani Adi, Panth.
Best Child Artist – Male – Master Rithun, Appuvinte Sathyanweshanam.


Organizations and Their Mottos


African Union A United and Strong Africa .
Amnesty International It is better to light a candle than to curse the darkness .
Association of South East Nations (ASEAN) One vision, One Identity, One community .
Federation Internationale de Football Association (FIFA) For the Game, For the World. .
International Basketball Federation (FIBA) We are basketball .
International Chamber of Commerce The World Business Organization .
International Committee of the Red Cross (ICRC) Inter Arma Caritas (In War, Charity) .
International Cricket Council (ICC) Great Sport, Great Spirit .
International Hockey Federation (FIH) FairPlay Friendship Forever .
International Olympic Committee Faster, Higher, Stronger (Citius, Altius, Fortius) .
International Union of Pure and Applied Chemistry (IUPAC) Advancing Chemistry Worldwide .
Internet Corporation for Assigned Names an...