What is the probability of:

Any day of a week is to be selected randomly.

What is the probability of:

Selecting one card from the pack of $52$ cards.

What is the probability?

One number from $10$ to $20$ is written on each card. Select one card randomly.

Write sample space $\left(\mathrm{s}\right)$ and number of sample points $\mathrm{n}\left(\mathrm{s}\right)$ for:

One coin and one die are thrown simultaneously.

Write sample space $\left(\mathrm{s}\right)$ and number of sample points $\mathrm{n}\left(\mathrm{s}\right)$ for the following:

Two-digit numbers are formed using digits $2,3$ and $5$ without repeating the digits.

The arrow is rotated, and it stops randomly on the disc. Find out on which colour it may stop.

In the month of March $2019$, find the days on which the date is a multiple of $5$.

Form a 'Road safety committee' of two, from $2$ boys $({\mathrm{B}}_1, {\mathrm{B}}_2)$ and $2$ girls $({\mathrm{G}}_1,{\mathrm{G}}_2)$. Complete the following activity to if the sample space committee of $2$ boys is $({\mathrm{B}}_1,{\mathrm{B}}_k)$, then find the value of $k$ is  _____.

Form a 'Road safety committee' of two, from $2$ boys $({\mathrm{B}}_1, {\mathrm{B}}_2)$ and $2$ girls $({\mathrm{G}}_1,{\mathrm{G}}_2)$. Complete the following activity . If the sample space committee of $2$ girls is $({\mathrm{G}}_1, {\mathrm{G}}_k)$, then find the value of $k$ is _____.