If two events don't occur at the same time,
then they are mutually exclusive events.
If a coin isn't tossed, then neither heads nor
tails occurs.
If the number of elements in a sample space
isn't 6, then a die isn't rolled once.
If a heads or a tails occurs, then a coin is
tossed.
If the number of elements in a sample space
is 6, then a die is rolled once.
If two events occur at the same time, then
they aren't mutually exclusive events.
If two events are mutually exclusive, then they
don't occur at the same time.
If a die is rolled once, then the number of
elements in the sample space is 6.
If a coin is tossed, then a heads or a tails
must occur.