If O is selected for the first Sunday, which one of the following is a concerto that must also be selected?
merxdxanon October 2, 2020
K
I understand how X is an answer but how is K not the correct answer? It says X cannot play 5 unless one of R's is picked 1st. O is first, which is R, then X plays 5.
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I think you're confusing sufficient and necessary. The rule is that X can't be five unless r is first. This doesn't mean that if r is first X must be five. I can't be potus unless I'm a citizen, but being a citizen doesn't make me president!
