The probability of the Sun setting in the west is $\ldots \ldots \ldots$

In any situation that has only two possible outcomes,each outcome will have a probability of $\frac{1}{2}$. True or false? Why?

If the probability of an event is $p$,the probability of its complementary event will be

$A$ carton contains $100$ trousers of which $73$ are good,$12$ have minor defects and $15$ have major defects. Manu rejects only those trousers which have major defects. One trouser is selected at random from the carton. Then,the probability that the selected trouser is accepted by Manu is $\ldots \ldots \ldots \ldots .$

Two unbiased dice are thrown once. Write all the possible outcomes of this experiment. What is the probability that the sum of numbers on two dice is greater than $9$?

$A$ child's game has $8$ triangles of which $3$ are blue and the rest are red,and $10$ squares of which $6$ are blue and the rest are red. One piece is lost at random. Find the probability that it is a
$(i)$ triangle
$(ii)$ square
$(iii)$ square of blue colour
$(iv)$ triangle of red colour