No amount of Tricks and jugad videos on youtube about csat gave me as much confidence as these videos by sir ! thanks a lot shunya for the free initiative and SIR for your lucid explanations
53:06 sir, i think an alternative easy method to solve the 14th question, or any of "atleast" questions, is to subtract that particular case from all cases in here the case "atleast one coffee in a row" would be (total cases - ['no coffee in a row at all' = all 3 positions in a row out of 3 rows to be occupied by 3 tea cups]) total cases: (9!/6!x3!) = 84 cases of 3 tea cups in a row = 3 (3 teas in 1st row + 2nd row + 3rd row, remaining 2 rows all coffees) hence, the solution is 84 - 3 = 81
Question number 13 no need to try out 24 combinations, rather 7 combinations are only possible as any combination greater than 329 will make the third row number exceed 1000
9 object in nine places > 9 ! Permutations But out of nine 6 coffe and 3 tea are same > 9!/ ( 6! * 3!) = 84 possible arrangements Possible rows with no coffee= 3 Ans=84-3=81.
41:17, there is another way for question 12. we go by 3rd and 4th statements. we assume 4 in 1st, 2nd and 3rd place(5 cases possible on writing down) and we assume 1 in 2nd, 3rd and 4th places ( 4 cases possible). out of 9 strike down the 3 repeated cases. we would be left with 6. BTW its very easy to see the answer and explain. i dont know if its just for me but when ever you see your ready made solution in your bottom left or right corners and write the same on board without solving it sincerely, i feel not so confident your teaching !
No amount of Tricks and jugad videos on youtube about csat gave me as much confidence as these videos by sir ! thanks a lot shunya for the free initiative and SIR for your lucid explanations
Quite literally the best video on this topic. Wasted 2 hours before I found this gem
53:06 sir, i think an alternative easy method to solve the 14th question, or any of "atleast" questions, is to subtract that particular case from all cases
in here the case "atleast one coffee in a row" would be (total cases - ['no coffee in a row at all' = all 3 positions in a row out of 3 rows to be occupied by 3 tea cups])
total cases: (9!/6!x3!) = 84
cases of 3 tea cups in a row = 3
(3 teas in 1st row + 2nd row + 3rd row, remaining 2 rows all coffees)
hence, the solution is 84 - 3 = 81
exactly. i also did the same. it takes less than a minute to do by this way
Thank you so much for this series.
Helped me in clearing CSAT as well as Prelims 2023. 💯
your result of prelim 2023 as come how?
Wonderful sir.. thanks for explaining in very conceptual manner
Thanks for this session! A lot more clarity on the topic. No shot I’d be attempting that 13th question. Too stressful.
I too thought the same
Sir explanation is fantastic 👌
Super sir
Very well explanation sir
48:02 ..sir why lengthy we have to check only 2..or 3 for 100th place
Thank you sir😊
thank you so muc hsir
Question number 13 no need to try out 24 combinations, rather 7 combinations are only possible as any combination greater than 329 will make the third row number exceed 1000
Thanks
This question can be solved in under a minute by combination formula 9C3 minus 3( where no row has coffee) formula. 9C3 is 84 and 84-3= 81
Shweta you have amazing feet, long and slim 👣🤤
9 object in nine places > 9 ! Permutations
But out of nine 6 coffe and 3 tea are same > 9!/ ( 6! * 3!) = 84 possible arrangements
Possible rows with no coffee= 3
Ans=84-3=81.
@@vvtindia 🙌🙌🙌🙌
@@vvtindia tq bro
41:17, there is another way for question 12. we go by 3rd and 4th statements. we assume 4 in 1st, 2nd and 3rd place(5 cases possible on writing down) and we assume 1 in 2nd, 3rd and 4th places ( 4 cases possible). out of 9 strike down the 3 repeated cases. we would be left with 6. BTW its very easy to see the answer and explain. i dont know if its just for me but when ever you see your ready made solution in your bottom left or right corners and write the same on board without solving it sincerely, i feel not so confident your teaching !
Sir,how to know a ques has red flag? Please guide..as due to panic..one can start the red flag ques
Hacker hai bhai hacker...itni aasani se kon samjhata hai
small correction sir, 7th question answer is option b ; 6
He told option b only
Thank you so much sir 😊, Explanation super 👌
Confusion in 1 and 9 th question. How in 1 St (2)^5 in 9 it is 6+6+6+6 . Anyone pls explain
Sir board ka sman aka kyu biathte ho thida side hokar bathiya .... board mai thk se nhi dikhta apki wajah sa
When will you upload PDFs to Permutation & Combination and Miscellaneous lectures?
In this video we are not able to read a question properly
Is this the last topic to be covered
Sir Q11 k 5 ways ho geee 4 nhi
Explanation
It's 4 only!
Hepal latya question tr show krt ja
Arey sir thoda hindi bhi bol lijiye india me rhte hai England me nhi
Question 13 has 3 possiblity not 2 3 no. are 297 273 293
we are not able to read the questions properly kindly consider it while making upcoming videos.
Thank you sir
Thank you sir😊
Thank you sir
Thank you sir🎉
Thankyou so much sir