If $P(A) : P(\bar{A}) = 3 : 2$,then $P(A) = \dots$

$A$ school has five houses $A, B, C, D$ and $E$. $A$ class has $23$ students: $4$ from house $A$,$8$ from house $B$,$5$ from house $C$,$2$ from house $D$,and the rest from house $E$. $A$ single student is selected at random to be the class monitor. The probability that the selected student is not from house $A, B$,or $C$ is: (in $/23$)

An unbiased coin is tossed thrice. The probability of receiving two heads is ..........

If $P(C) = \frac{2}{5}$,then $P(\bar{C}) = \ldots \ldots \ldots$

The probability of a non-leap year having $53$ Fridays is $\ldots \ldots \ldots$

$A$ game consists of spinning an arrow which comes to rest pointing at one of the regions ($1, 2$ or $3$). Are the outcomes $1, 2$ and $3$ equally likely to occur? Give reasons.