1. from among eight volunteers-a,b,c,d,e,f,g, and h- a park ranger must select at least four for a search party. The park ranger's selections are bound by the following restrictions:
if A is selected, B must be selected.
if either C or D is selected, both C and D must be selected.
If E is selected, D cannot be selected.
Either E or G must be selected, but E and G cannot both be selected.
H and B cannot both be selected if G is selected
문제: G must be selected for the search paty if:
a) A is not selected
b) B is not selected
c) C is not selected
d) F is not selected
e) H is not selected
왜 그런진 이해가되지만 문제집 해설이 마음에 들지 않습니다.
해설에서는 EFH만 available하다고 하던데 왜 CD는 available하지 않는거죠??