For a gaussian random variable X having ax $=3,$ x$=2,$ the probability of the event $\{$X $>5\}$ is:Question $4$Answera$\mathrm{.}0\mathrm{.}3085$b$\mathrm{.}0\mathrm{.}6915$c$\mathrm{.}0\mathrm{.}1587$d$\mathrm{.}0\mathrm{.}8413$