pnc
I multiplied 8 with 8 factorial because zero 1st posi chord kr koi si bhi occupy kr skta hai. Is it the right thought que 15
17 Replies
@Apu
Note for OP
+solved @user1 @user2... to close the thread when your doubt is solved. Mention the users who helped you solve the doubt. This will be added to their stats.,rotate
Konsa question?
15
k should be 8 right?
17
Each digit is used atmost once=one number left. This has to be 0 or 9. Now the remaining numbers can be arranged with:
1. 8.8! when zero is there
2. 9! if zero is not there
So, in total there are 17.8! ways
What bout the divisibility by 9 criteria ??
0+1+2+..+9 is divisibke by 9. These are 10 digits and you have to use 9. So, we can only remove 0 or 9
ohh...got it, wht i missed
sweet. can you please close it out?
ohh i took divisibility criteria wrong. thanx
+solved @SirLancelotDuLac
Post locked and archived successfully!
Archived by
<@1088352651567173632> (1088352651567173632)
Time
<t:1728058360:R>
Solved by
<@1075951732460376214> (1075951732460376214)