The probability of getting two heads in the experiment of tossing an unbiased coin twice is .........

$A$ die has its six faces marked ${0, 1, 1, 1, 6, 6}$. Two such dice are thrown together and the total score is recorded.
$(i)$ How many different scores are possible?
$(ii)$ What is the probability of getting a total of $7$?

There are $5$ white,$7$ red,$4$ black and $2$ blue identical balls in a box. One ball is selected at random from the box. Find the probability that the ball is not blue.

Two dice are thrown at the same time and the product of numbers appearing on them is noted. Find the probability that the product is less than $9$.

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

$A$ 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 $\ldots \ldots \ldots \ldots .$