I am sharing screen shot of a question outside the greg math content.
I tried using combinatorics to solve
working below
1-(4/54/54/51/45/8)5!
Could you please advice on the same why the above method aint working ?
Why are you multiplying by 5!?
If 0 represents a “fail” and a 1 represents a pass then for the case of failing all subjects, you’re looking for this specific tuple (outcome):
(M, E_n, E_c, A, B)= (0,0,0,0,0).
There are no other tuples to consider.
Other than that, your idea of finding the complement (by doing 1 - failing all) is fine.
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