An unbiased coin is tossed thrice. Find the probability of the following event:
$C:$ at most $2$ heads are received. (in $/8$)

There are $6$ green,$5$ red,and $4$ blue identical balls in a bag. One ball is drawn at random from the bag. The probability that the ball drawn is not red is ...........

$A$ school has five houses $A, B, C, D$ and $E$. $A$ class has $23$ students: $4$ from house $A$,$8$ from house $B$,$5$ from house $C$,$2$ from house $D$,and the rest from house $E$. $A$ single student is selected at random to be the class monitor. The probability that the selected student is not from house $A, B$,or $C$ is: (in $/23$)

$A$ card is drawn at random from a well-shuffled pack of $52$ cards. The probability that the card drawn is not an ace is ..........

The probability of the month of December in any year having $5$ Saturdays is $\ldots \ldots \ldots$

Two balanced dice are rolled simultaneously. Then,the probability that the same number appears on both the dice is ..........