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[QUOTE="JVal, post: 2668921, member: 138487"]
first of all using an actual coin is not 50/50 bc both sides are not equal (indentations and protrusions)

take the american quarter for example

the heads side weighs slightly more so it is ever so slightly more likely to lands tails up

but lets say we have an exactly homogeneous coin with absolutely exact measurements that produce no bias at all and we assume no outside factors affect the flip

then the coin is 50/50

now as to your question the coin doesnt "choose" which side it lands on

the side it lands on is determined by how hard we flip the coin

since this is hard to duplicate exactly that is where there the randomness comes from

note though if you flip a coin billions of times, it will not land on heads exactly 50% of the time

thats due to variance

not sure what you mean by landing on its edge

i suppose if you had a really thick coin it could land on its edge maybe once out of 10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 times or so
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