If $P(\overline{B}) = 0.81$,then $P(B) = \ldots$

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 selected ball is not white.

Two dice are thrown at the same time. Find the probability of getting:
$(i)$ same number on both dice.
$(ii)$ different numbers on both dice.

If $P(A) = 0.54$,then $P(\overline{A}) = \ldots$

If $P(E) = 0.05$,what is the probability of 'not $E$'?

If $P(A) : P(\bar{A}) = 5 : 3$,then $P(\bar{A}) = $ ........