The probability of scoring $100$ marks in a question paper of $100$ marks is ................

$A$ card is drawn at random from a well-shuffled pack of $52$ cards. The probability of that card being a card of a black suit is .............

An unbiased coin is tossed thrice. The probability of receiving two heads is ..........

$A$ balanced die is thrown once. Find the probability of getting a prime number.

$A$ 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 $/12$)

There are $5$ red,$8$ white,and $4$ green balls in a box. If one ball is drawn at random from the box,find the probability that the ball drawn is white.