The probability of the month of February in a leap year having $5$ Fridays is ..........

$A$ balanced die is thrown. Find the probability that the number on the die is a multiple of $3$.

Two balanced dice are rolled simultaneously. Then,the probability that the sum of numbers on the dice is $12$ is ........

At a fete, cards bearing numbers $1$ to $1000$, one number on one card, are put in a box. Each player selects one card at random and that card is not replaced. If the selected card has a perfect square greater than $500$, the player wins a prize. What is the probability that:
$(i)$ the first player wins a prize?
$(ii)$ the second player wins a prize, if the first has won?

The probability of the month of April in any year having $5$ Sundays is ......... (in $/7$)

An integer is chosen between $0$ and $100$. What is the probability that it is
$(i)$ divisible by $7?$
$(ii)$ not divisible by $7?$