If you flip a coin twice, what is the probability that a head or a tail will land up on the first flip. Express your answers as a percent.

1 answer

ummmmhh,
On the first flip, it will land either heads or tails or an extremely low probability that it will land on its edge.

Would you believe that they actually did an experiment at Harvard for that condition
http://adsabs.harvard.edu/abs/1993PhRvE..48.2547M
Using their results
your prob = 1 - 1/6000
= 5999/6000 = appr 99.983%

btw, what does flipping it twice have to do with your question?