Question

Which of the following statements is the contrapositive of "If I have money, then I spend it"?

If I don't have money, then I don't spend it.
If I spend money, then I have it.
If I don't spend money, then I don't have it.

Answer 1

P: i have money
\(\lnot P\) i do not have money
Q: i spend it
\(\lnot Q\) i do not spend it
statement
\(P\to Q\) if i have money, i will spend it

contrapositive
\(\lnot Q\to \lnot P\)
if i don't spend it, then i don't have money

Answer 2

If I don't spend money, then I don't have it. is more idiomatic inglish

Answer 3

Thank you.

Answer 4

if i dont spend it, then i dont have it... you flip it and make it negative