For any event $A$,which of the following is true?

One die of red colour,one of white colour and one of blue colour are placed in a bag. One die is selected at random and rolled,its colour and the number on its uppermost face is noted. Describe the sample space.

If $P(A)=0.59, P(B)=0.30$ and $P(A \cap B)=0.21$,then $P(A^{\prime} \cap B^{\prime})$ is equal to

$A$ die is thrown. Find the probability of the following event: $A$ number greater than or equal to $3$ will appear.

The probability of getting at least one tail in $4$ throws of a coin is

Two unbiased dice are thrown. Then the probability that neither a doublet nor a total of $10$ will appear is