Question 198317
sol:
negation:
if a statement is modified by using  the word 'not',then the new statement so formed is called the negation of the given statement
 1).someone in the family makes bread
negation:someone in the family not makes bread

2).
disjunction:if two or more statements are combined by the connective'or' the resulting compound statement is called disjunction
p    q      pvq
T    T       T
T    F       T
F    T       T
F    F       F

Now the given statements are
p.Mary is on the bus
q.April is in the car
r.Stan is at the zoo
now p v ~r
step1:
write the negation for r
stan is at the zoo
~r=stan is not at the zoo
step2:
p v ~r
mary is on the bus v stan is not at the zoo
T v F =T  (i.e;according to disjunction table)
p v ~r= mary is on the bus

conditional or implication:
if two or more simple statements are combined by the connective "if---then" the resulting compound statement is called conditional
p   q    p=>q
T   F     F
T   T     T
F   T     T 
F   F     T
STEP3:
q.April is in the car
~q=April is not in the car
step4:
(pv~r)=> ~q
mary is in the bus => April is not in the car
T=>F=F(I.E;ACCORDING TO THE CONDITIONAL TABLE)
the result is April is not in the car
(pv~r)=> ~q = April is not in the car