A coin is tossed five times. By counting the elements in the following events, determine the probability of each event.

a. Heads never occurs twice in a row.
First I thought it could be: H T H T H or T H T H T but still thinking more this does not seem right.

Question

A coin is tossed five times. By counting the elements in the following events, determine the probability of each event.

a. Heads never occurs twice in a row.
First I thought it could be: H T H T H or T H T H T but still thinking more this does not seem right.

anonymous · Answer

consider all possibilities WITH 2 heads in a row, the chance of that not happening is 1 - the chance it will happen.

H H X X X
X H H X X
X X H H X
X X X H H

I'm presuming X can be either, now can you work with that?

anonymous · Answer

not sure

anonymous · Answer

I think i should be able to now. Thank you.