Falling Behind in Studies? Join Our Performance Improvement Batch. Enroll For Free
One of our academic counsellors will contact you within 1 working day.
Click to Chat
1800-1023-196
+91-120-4616500
CART 0
Use Coupon: CART20 and get 20% off on all online Study Material
Welcome User
OR
LOGIN
Complete Your Registration (Step 2 of 2 )
there are 6 keys and 6 locks. then number of combinations to be tried out to get the actual solution.
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! waystotal 6! * 6!
Post Question
Dear , Preparing for entrance exams? Register yourself for the free demo class from askiitians.
points won -