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Gap Method
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This lesson explains the gap method of Permutations and combinations.

Vineet Loomba is teaching live on Unacademy Plus

Vineet Loomba
IITian | Best Online Maths Educator | Highest Overall Watch Time | 8+ Years Experience | Youtube: Maths Wallah | vineetloomba.com

U
Unacademy user
sir!!!I will give you my all hats ..u r best teacher on unacademy
Vineet Loomba
2 months ago
Thanks
EDUCATIONAL GUYS
2 months ago
sir u r the best...thanks a lot...I m in class 10th...instead of that even I could easily catch all if lessons...u r a mathemagician...I learnt a lot from u.. thank u so much for assisting us..
sir girls and boys ke section mein wo jo 5!*4! hain usme boys alag se arrange nahi honge kya ... my doubt is ki wo 5!*4!to honge pr usme 4! multiply hona chahiye 4 boys ki arrangements ka
sir I think ki 4th part me All Girls together ke case me [4!×4!×2!] hoga. Sir please solve my confusion.
Vineet Loomba
4 months ago
Nhi aisa nhi hoga ..apne video suni h dhyan se ya sirf slides dekh rhe ho ..2-3 baar dubara suno..explain kiya h poora
Ajeet Chaudhary
4 months ago
Sir Mujhe apke is 4 hour ke Lesson Ko complete karne me 7 hour se Jada lag Gaye. 4 hour lecture dekhne me 2 hour extra unko Sahi se samajne me aur phir 1 and half hour Notes banane me. Sir aap Kah rahe hain Slides swipe kar rahe ho.
Ajeet Chaudhary
4 months ago
Sir 4 Girls hain and 4 boys hain. Hame all Girls together ka case chahiye to boys together karne hi parenge. Now we have 2 groups 1 of Boys and 2nd of Girls to unko arrange karne ke 2! ways honge . Now 4 Girls to usi group me 4 places me arrange kane ke 4! ways honge. And same for boys 4! way. To sir is hisaab se to [2!×4!×4!] Hina chahiye na.
Vineet Loomba
4 months ago
All girls together chie toh boys kyun together krne h ..girls ko together krenge na ...aur maine sirf pucha tha ki kahin slide swipe toh nhi kr rhe .. kyun ki bht log krte h aisa ..toh mjhe kaise pta chlega ..isliye pucha
sir third part me no two girls sit together ka answer second part se match hona chahiye because waha bhe sab alag baithe h
sir please background White Rakha Karen pleaseeeeeeeeeeeeeeee.
Vineet Loomba
4 months ago
Ye pehle ke videos h ..inko abhi change nhi kr skte
Ajeet Chaudhary
4 months ago
To sir present ke videos me White Rakiyega Please.
  1. PERMUTATIONS AND COMBINATIONS JEE MAIN AND ADVANCED (IIT-JEE) IIT-JEE MATHS MADE EASY PREPARED BY: ER. VINEET LOOMBA IITiAN | IIT-JEE MENTOR FoR SURE SHoT SUcCESS IN JEE MAIN AND ADVANCED (IIT-JEE)


  2. 100% SUCCESS IN 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. Share among your peers as SHARING is CARING !!


  3. 100% SUCCESS IN JEE MAIN AND ADVANCED (IIT-JEE) GAP METHOD ExThere are 4 boys and 4 girls and they are to be seated in a row. In how many ways can they be arranged if boys are at odd places and girls are at even places. MATHEMATICS FOR IIT-JEE ER. VINEET LOOMBA (IIT RooRKEE)


  4. 100% SUCCESS IN JEE MAIN AND ADVANCED (IIT-JEE) () If boys and girls are to sit alternatively. Cand 41x41 =526 5 +57 Cuse (ii) if no two girls should sit together 5 MATHEMATICS FOR IIT-JEE ER. VINEET LOOMBA (IIT RooRKEE)


  5. 100% SUCCESS IN JEE MAIN AND ADVANCED (IIT-JEE) 5 (iv) Find the number of ways such that not all girls are together H 51u to a MATHEMATICS FOR IIT-JEE ER. VINEET LOOMBA (IIT RooRKEE)


  6. 100% SUCCESS IN JEE MAIN AND ADVANCED (IIT-JEE) Ex: 10 persons from A toJ are given. Find the total number of ways of arranging them such that B and C are together, E and F are together but A and J are never together. (8,c) (E,F) Tst 8I21 21 , 1212.21 eg Au gl 2) 2}- 1 212/2/ MATHEMATICS FOR IIT-JEE ER. VINEET LOOMBA (IIT RooRKEE)


  7. 100% SUCCESS IN JEE MAIN AND ADVANCED (IIT-JEE) Ex: 4 boys and 4 girls are to sit alternatively. Also it is given that one pair of brother and sister are to sit together. Find the total number of seating arrangements. -Sis MATHEMATICS FOR IIT-JEE ER. VINEET LOOMBA (IIT RooRKEE)


  8. 100% SUCCESS IN JEE MAIN AND ADVANCED (IIT-JEE) Ex: 10 boys and 4 girls. Arrange such that no two girls are together Inup TM MATHEMATICS FOR IIT-JEE ER. VINEET LOOMBA (IIT RooRKEE)


  9. REVISION COURSE FOR JEE MAIN AND ADVANCED (IIT-IEE 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. Share among your peers as SHARING is CARING !!