Question

What is difference between biased and unbiased coin?

Answer 1

literally unbiased means truthful which gives correct judgement and so a unbiased coin is a natural coin in which no changes are made and can be assumed probability of head and tail is 1/2 while a bised coin is the one in which we have made a dispute and will show a wrong answer.

Answer 2

Unbiased coin mean Coin is Fair...i.e, Whatever outcome we get from the coin when it is being tossed is equally likely for us...
For example...We toss a coin Marking Head on one face and Tail on other face...The outcome of Head and tail is equally likely...i.e, There is 50% Change for each outcomes...So we say coin is Unbiased..

Suppose We tossed a coin Marking Head or Tail on each face...Then we dint get equally likely outcome from such coin..So we say coin is Bias...i.e, Unfair...

hope this help...