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saurabhmahajan
- Master | Next Rank: 500 Posts
- Posts: 250
- Joined: Thu Jan 07, 2010 2:21 am
- Thanked: 10 times
Hi Friends,
I am currently working on permutation and combination chapter. yesterday i was at the ATM and just thought how many combinations of my pin can be done IF no zero (0) should be there in my pin. I did the following way. Please check and let me know if i was right.
four numbers in pin which are repeatable.
so for first number 9 choices (1-9)
for second also 9 choices
for third also 9 choices
for fourth also 9 choices
so total combinations would be 9*9*9*9 = 6561
am i correct ?
I am currently working on permutation and combination chapter. yesterday i was at the ATM and just thought how many combinations of my pin can be done IF no zero (0) should be there in my pin. I did the following way. Please check and let me know if i was right.
four numbers in pin which are repeatable.
so for first number 9 choices (1-9)
for second also 9 choices
for third also 9 choices
for fourth also 9 choices
so total combinations would be 9*9*9*9 = 6561
am i correct ?
Thanks and regards,
Saurabh Mahajan
I can understand you not winning,but i will not forgive you for not trying.
Saurabh Mahajan
I can understand you not winning,but i will not forgive you for not trying.
nice
