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Grade:

                        

there are 6 keys and 6 locks. then number of combinations to be tried out to get the actual solution.

9 years ago

Answers : (1)

Deepak Kumar Shringi
askIITians Faculty
4403 Points
							for first key 6 options for 2ndkey 5 options (one already unlocked by 1stkey )
so total 6! ways but selection of keys can also be made in 6! ways
total 6! * 6!
one year ago
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