OpenStudy (angel_kitty12):

Anyone at all? Please help? I always give medals and such. Please A fair coin is flipped four times. Find: (A) the probability it will land up heads each time. (B) The probability it will land the same way each time (slightly different from (A))

OpenStudy (supernaturallvr24):

A would be 1/2. Let me think on B...

OpenStudy (angel_kitty12):

But why?

OpenStudy (supernaturallvr24):

A would be 1/2 because there are only 2 different ways it could land. 50/50 chance of landing on each.

OpenStudy (angel_kitty12):

So disregard the four times right?

OpenStudy (supernaturallvr24):

No don't. I'm saying that for each flip, it's a 1/2 chance.

OpenStudy (angel_kitty12):

Oh okay

OpenStudy (supernaturallvr24):

Not sure about B though, sorry.

OpenStudy (directrix):

When you flip 4 coins, there are 16 outcomes in the sample space. HHHH THHH HHHT THHT HHTH THTH HHTT THTT HTHH TTHH HTHT TTHT HTTH TTTH HTTT TTTT

OpenStudy (directrix):

Note: Flipping 1 coin 4 times amounts to the same outcomes here as flipping one coin 4 times. Of the 16 possible outcomes, there is only one outcome with heads each time: HHHH. P(4 Heads) = 1/16 @Angel_Kitty12 @Supernaturallvr24 >>> A would be 1/2 because 1/2 is not correct for Part A.