The probability of a non-leap year having $53$ Saturdays is .......

In a family having three children,there may be no girl,one girl,two girls,or three girls. So,the probability of each is $\frac{1}{4}$. Is this correct? Justify your answer.

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

Two balanced dice are rolled. Find the probability that the sum of numbers on two dice is greater than $8$. (in $/18$)

$A$ balanced die is thrown once. Find the probability of getting a number smaller than $4$.

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 an odd number.