00:01
Hello students we are going to write here the combination to a log consists of sequence of three numbers ranging from 0 to 40.
00:09
So we are going to write here for this in the first case total number of total number of possible combinations are we are going to write here for this in the first case we need to write here for this.
00:28
So first value will be filled by 40 combination then other two values are same for two consecutive.
00:37
So it means that we need to take 39.
00:40
So let's erase this to make it more clear.
00:43
This is 39 multiplied by 39.
00:46
So we are going to calculate this.
00:48
This will be so this will be 6840.
00:54
We are going to write here for this.
00:56
These are total number of combinations.
01:00
So let us talk about our b part which is if all three numbers are different than number of combinations are.
01:08
So in this particular case, total number of combination if all three numbers are different.
01:17
So total number of possible combinations, we are going to write here for this, this must be written as if i write here 40, 39, 38, this must be written as 59, 280.
01:39
This must be written as 59 ,280...
