Question

what is contrapositive of sentence- if the weather is fine then my friends​ will come and we go for a picnic

Answer 1

Switching the hypothesis and conclusion of a conditional statementand negating both. For example, thecontrapositive of "If it is raining then the grass is wet" is "If the grass is not wet then it is not raining." Note: As in the example, the contrapositive of any true proposition is also true.
In your sentencethe weather is fine then my friends​ will come and we go for a picnic.
here if the weather is not fine you will not be able to go for picnic.
hope it will help you

Answer 2

Answer:

underlinecthe If clause