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p: Mary is on the bus.
q: April is in the car.
r: Stan is at the zoo
Since r: Stan is at the zoo, this means that
~r: Stan is NOT at the zoo
Also, because q: April is in the car, this tells us that
~q: April is NOT in the car
Now, translate p v ~r:
p v ~r: Mary is on the bus OR Stan is NOT at the zoo
Now connect this with ~q in the form of IF...THEN (since --> means IF..THEN) to get:
IF Mary is on the bus OR Stan is NOT at the zoo, THEN April is NOT in the car.
So the compound statement (p v ~ r) --> ~q translates to:
(p v ~ r) --> ~q : IF Mary is on the bus OR Stan is NOT at the zoo, THEN April is NOT in the car.