One tossed coin landing heads and the next landing tails

1/4 or 0.25

Step-by-step explanation:

*I'm assuming you're asking about the probability of this happening ...

There are 4 different results you can get when flipping a coin twice ...

First Flip: heads

Second Flip: tails

First Flip: heads

Second Flip: heads

First Flip: tails

Second Flip: heads

First Flip: tails

Second Flip: tails

only one of these is heads, then tails, so our probability is

1/4, or 0.25