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

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

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

There are chits numbered $1$ to $20$ in a box. One chit is drawn at random. Find the probability that the number on the chit is a multiple of $5$. (in $/5$)

Two unbiased dice are thrown once. Write all the possible outcomes of this experiment. What is the probability that the sum of numbers on two dice is smaller than $13$?

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