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Tossing a coin is an independent event. It's outcome does not depend on what happened before.
so what are the chances of tossing a head?
1/10? or 2/10 right?
not quite. when you toss a coin it can come up either heads or tails.
remember it is independent of what happened before
yea so its ... 9/10??
what would you say are the chances of tossing a head on the first throw?
uhh..... 1 out of 10
so if I just gave you a coin and asked you to toss it you think there is a 1/10 chance of getting a head? which means you are saying there is a 9/10 chance of getting a tail does that sound right to you?
suppose I had a box with one blue ball and one red ball in it. what are the chances of you picking a blue ball?
so, similarly, a coin has two sides. so if you toss it, what are the chances of getting a head?
1/2 !!! right? :D
bingo! well done - you got there in the end :p