Answer
(d)
Work Step by Step
$z=\frac{\overline{x}-\mu}{\sigma/\sqrt n}=\frac{357-100}{50/\sqrt{8}}\approx14.54$
Thus, using the table, the probability of obtaining a result more extreme than $z$: $P(Z\gt14.54)=P(Z\lt-14.54)\approx0$.
Thus the answer is (d).
