$A$ balanced die is thrown. Find the probability that the number on the die is even.

Three unbiased coins are tossed simultaneously. Then,the probability of receiving at the most two tails is ........

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 selected ball is either white or blue.

$A$ class consists of $35$ boys and $25$ girls. One student is selected at random to be the class monitor. Find the probability that the selected student is a girl. (in $/12$)

$A$ card is selected at random from a well-shuffled pack of $52$ cards. Find the probability that the selected card is that of spades.

Total number of outcomes in the experiment of rolling two balanced dice once is ..........