Final answer:
The contrapositive of the statement 'If there is a lightning storm, then we won’t go swimming' is 'If we go swimming, then there is not a lightning storm.'
Step-by-step explanation:
The contrapositive of a conditional statement is formed by negating both the hypothesis and the conclusion of the original statement and then reversing them. The contrapositive always has the same truth value as the original statement.
The original statement here is "If there is a lightning storm, then we won’t go swimming." To form the contrapositive, one would negate both the hypothesis and the conclusion and then reverse them, resulting in "If we go swimming, then there is not a lightning storm."