If an event cannot occur,then its probability is

$A$ balanced die is rolled once. Then,the probability that the number on the die is a composite number is .......

The probability of getting the number $7$ while throwing a balanced die once is ...........

Two balanced dice are rolled. Find the probability that the sum of numbers on two dice is smaller than $7$.

$A$ bag contains orange flavoured candies only. Rahi takes out one candy without looking into the bag. Then,the probabilities that the candy taken out is orange flavoured and is lemon flavoured are ........ respectively.

Two unbiased dice are thrown once. Write all the possible outcomes of this experiment. What is the probability that the sum of the numbers on the two dice is a multiple of $3$ and $4$?