Combinatorics Lesson 1 [sum rule and product rule]
Questions

1
problem related to video
I am unable to see video . i can just hear audio . is there any issue with this video ? or its frm my side ?

3
Palindromes Problem
Sir in palindroms problem Task 5,6,7 dependent on Task 1,2,3 respectively.then how can we apply here Product rule?

2
number of 5 digit integers possible @ 17:34
sir for 5 digit integers problem we should use 6 positions as 1st position for sign(negative or positive) and 2nd6th for 5 digit number.
in that way the ans will be 2x9x10^4. 
3
problem(5 member committee) in combination
sir according to product rule at 8:24 possblie solution would be 5*9*8*7*6 ie 5 for raju snd remaing 4 for other persons but sir according to the combination 5* 9C4=(9*8*7*6*5)/4! answer are different

As it is 5 member committee . and by looking at your number of people are 10
If raju sits at a fixed seat or position leaving other 4 seats or position for the remaining members then sitting of raju can be done only in 1 way i.e.
answer should be (1*9*8*7*6) by product rule.
And according to definition of combination you to select people first((9C4) and then arrange them(4!) later , assuming raju sits on a fixed position. Then total number of ways of committee forming is 1*( 9C4 * 4! ) which is equal to (1*9*8*7*6)

1
If the word "INDEPENDENCE " do all vowel occur together how can calculate total no of arrangement ?

Please watch all the combinatorics lectures and then try to answer this question. After that if you can not answer this question then please post your question in the below forum. http://forum.thegatebook.in/


1
at time 18:53

1
@21:50
Sir, C1(1,2,0) and C2(0,2,0). Sir there can be Case (1,1) when both rani and vani will go and when only vani will go(0,1). Sir,these two can be considered or not?

0
link for combinatorics practise questions??

0
At 24:40 why taking t5 as 4 and t6 as 3....why we cannot select as 4C2 ways for selecting 2 places for 5 and 6