Question

“If Maya is in the cafeteria, then Judy is in the classroom.”

Which of these is logically equivalent to the above statement?
Answer

If Judy is not in the classroom, then Maya is not in the cafeteria.

If Judy is in the classroom, then Maya cannot be in the cafeteria.

If Maya is not in the cafeteria, then Judy must be in the classroom.

If Maya is in the cafeteria, then Judy cannot be in the classroom.

Answer 1

contraPositive

Answer 2

if p then q = if -q then -p

Answer 3

switch and negate

Answer 4

soo the 1st one?

Answer 5

i think english and math should never mix; but A seems most appropriate to me :)

Answer 6

...1st one. used to seeing letters

Answer 7

Yeah, its critical thinking stuff mixed with geo. its lame.