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Dearrangement
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This lesson discusses the concept of dearrangement in permutations combinations for jee main ans advanced

Vineet Loomba is teaching live on Unacademy Plus

Vineet Loomba
IITian | No. 1 Educator in IIT-JEE (Maths) | 4 Million Minutes Watch Time | 8+ Years Experience | Youtube: Maths Wallah | vineetloomba.com

U
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Deepak N Chauhan
7 months ago
Welcome manju
SD
Sir please add multinomial theorem in the lectures
GK
Sir bahut achha laga
Vineet Loomba
4 months ago
Thanks ..apne frnds ke saath bhi share kariyega
KG
sir I did not understand the calculation of 4 diff. col.balls and 4 boxes
Vineet Loomba
6 months ago
Wht is the difficulty u r facing ?? ..1-2 baar dubara dekho
sir. how to solve these problems with cases ? and how to derivate these formula
Vineet Loomba
7 months ago
This is a shortcut ..derivation is not in syllabus..infact formula is nit in syllabus. . written nowhere :)
Kuldeep Solanki
7 months ago
ok . thanks sir
  1. PERMUTATIONS AND COMBINATIONS JEE MAIN AND ADVANCED (IIT-JEE) IIT-IEE MATHS MADE EASY PREPARED BY: ER. VINEET LOOMBA IITiAN | IIT-JEE MENTOR FoR SURE SHoT SUcCESS IN JEE MAIN AND ADVANCED (IIT-JEE)


  2. FOR 100% SUCCESS IN JEE MAIN AND ADVANCED (IIT-JEE) SPECIAL ANNOUNCEMENT Share useful links and advice with your learners... CRASH COURSE FOR JEE MAIN 2019 (JANUARY SESSION) Find courses & lessons 735 Courses IIT JEE 2,521 Courses Str Chemistry 797 Courses Details in Plus Tab w Eet My Feed HINDI Home My Library Plus Profile


  3. REVISION COURSE FOR JEE MAIN AND ADVANCED (IIT-JEE) ABOUT ME B.Tech. From IIT Roorkee IIT-JEE Mentor Since 2010 Doubts/Feedback in Comment Section * Comment other topics you want to revise. Follow me @ https://unacademy.com/user/vineetloomba to get updates or search me on Google * Share among your peers as SHARING is CARING!!


  4. FOR 100% SUCCESS IN JEE MAIN AND ADVANCED (IIT-JEE) DEARRANGEMENT THEOREM If n things are arranged in a row, the number of ways in which they can be dearranged so that no one of them occupies its original place is. 1! 2! 3! n. MATHEMATICS FOR IIT-JEE ER. VINEET LOOMBA (IIT RooRKEE)


  5. FOR 100% SUCCESS IN JEE MAIN AND ADVANCED (IIT-JEE) If n things are arranged at n places then the number of ways to rearrange exactly r things at right places is 1 n-r r! 2! 3! 4! MATHEMATICS FOR IIT-JEE ER. VINEET LOOMBA (IIT RooRKEE)


  6. FOR 100% SUCCESS IN JEE MAIN AND ADVANCED (IIT-JEE) Ex. There are 3 letters and 3 envelopes. Find the number of ways in which all letters are put in the wrong envelopes. (A) 6 The required number of ways (B) 4 (C) 2 (D) None of these Sol. =31L1-11 + 21-31 3! 2! Ans.[C] MATHEMATICS FOR IIT-JEE ER. VINEET LOOMBA (IIT RooRKEE)


  7. FOR 100% SUCCESS IN JEE MAIN AND ADVANCED (IIT-JEE) There are 4 balls of different colour and 4 boxes of colours same as those of the balls. Then find the number of ways to place two balls in the boxes with respect to their colour. (A) 6 The required number of ways Ex. (B) 4 (C) 2 (D) None of these Sol. 4.3Ans.[A] MATHEMATICS FOR IIT-JEE ER. VINEET LOOMBA (IIT RooRKEE)


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