Chat with our AI personalities
It may be because you do not understand the process yourself!
Assuming the the last part of the question is that the sequence may not END in 000, there are 2997 sequences.
1260.
Parallel, Perpendicular, and Planes.
There are 15 504 ways that an instructor may select 5 textbooks from possible 20. The expression to use for this calculation is: 20C5 = 20!/[5!∙(20-5)!] = 15 504 and it reads as: The number of different combinations of 5 entities you can get from a collection of 20 different entities is. where the symbol !, stands for factorial, such that: n! = n∙(n-1)∙(n-2)∙(n-3)∙,,,∙(4)∙(3)∙(2)∙(1) e.g., 5! = 5x4x3x2x1 = 120