1)

The contrapositive of the statement:"If the weather is fine then my friends will come and we go for a picnic".


A) The weather is fine but my friends will not come or we do not go for a picnic

B) If my friends do not come or we do not go for picnic then weather will not be fine

C) If the weather is not fine then my frioends will not come or we do not go for a picnic

D) The weather is not fine but my friends will come and we go for a picnic

Answer:

Option B

Explanation:

Given statement is 

" If the weather is fine then my friends will come and we go for a picnic".

 Here, p= the weather  is fine

q= my friends will come

r= we go for a picnic

 Symbolic form is  $p\rightarrow (q \wedge r)$

 contrapositive of   $p\rightarrow q$  is $\sim q\wedge \sim p$

 $\therefore$     Contrapositive  of  $p\rightarrow (q   \wedge r)\sim(q\wedge r)\sim p$

 $\Rightarrow$    $( \sim q \vee\sim r)\rightarrow\sim p$

$\therefore$ Contrapositive of the given statement is, if my friends will not come  or we do not go for a picnic then weather will not fine.