Arun comes with a coin which has head on both the sides. He then tells 'I am going to conduct a random experiment by tossing this coin and seeing whether it is head or tail”. Statement: what Arun conducted was not a random experiment.
An experiment is called random if it satisfies the following conditions
(i)It has more than one possible outcome
(ii)It is not possible to predict the outcome in advance
(iii) All the possible outcomes are known before hand
Arun had a coin whose both sides were head. So, it will have only one outcome; first condition is not satisfied.
We can see that it does not satisfy the second condition also. We are able to predict the outcome in advance.
We can't call the experiment a random experiment.