An unbiased coin is tossed thrice. The probability of getting a tail all three times is ...........

All the jacks,queens,and kings are removed from a deck of $52$ playing cards. The remaining cards are well shuffled,and then one card is drawn at random. Giving ace a value of $1$ and similar values for other cards,find the probability that the card has a value:
$(i)$ $7$
$(ii)$ greater than $7$
$(iii)$ less than $7$

An unbiased coin is tossed thrice. Find the probability of the following event:
$C:$ at most $2$ heads are received. (in $/8$)

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 $/5$)

There are $5$ white,$7$ red,$4$ black and $2$ blue identical balls in a box. One ball is selected at random from the box. Find the probability that the ball is not blue.

The probability of the month of August in any year having $5$ Mondays is ..........