Question

Read the proposition and the implication shown below.

“If the wall is strong, it is made of concrete.”

Which statement is a contrapositive to the proposition and logically equivalent to it?

If the wall is not made of concrete, it is not strong.

If the wall is not strong, it is not made of concrete.

If the wall is made of concrete, it is strong.

If the wall is not strong, it is made of concrete.

Answer 1

statement if a, then b. contra-positive would be if not b, then not a

Answer 2

a??

Answer 3

That's my thought

Answer 4

Thank you

Answer 5

np

Answer 6

A, is 100% correct. c: