If the probability of an event is $p$,the probability of its complementary event will be

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

$A$ balanced die is rolled twice. Then,the probability of the event that the sum of the numbers received in two trials is more than $10$ is ...........

$A$ circle with radius $7 \, cm$ is drawn at the centre of a rectangle $28 \, cm$ long and $22 \, cm$ broad. Find the probability that a ball hitting the rectangle hits the circle.

Find the probability that a leap year has $53$ Thursdays.

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 $/5$)