The members of a group travelling to Venice were offered by their travel agency 4 additional disjoint options of their choice.
Knowing that each option was selected by 80% of the members, what minimal percentage p choose ALL THE 4 OPTIONS?
(In reply to I want it all (spoiler)
by Steve Herman)
Your "final" answer is correct<o:p></o:p>
"The minimum p is achieved when as many members as
possible choose 3 out of 4 options. "
- true, BUT WHY?
Please comment on the assumption "if 20% etc.."
IMHO- There is much simpler explanation...