Answer
$P(x < 24.9) = 0.0764$
Work Step by Step
$\mu$ = 25, $\sigma$ = 0.07
Want to find $P( x < 24.9 )$
i) Convert 24.9 to a z-score:
z = $\frac{x - \mu}{\sigma}$
z = $\frac{24.9 - 25}{0.07}$
z= -1.43
ii) $P(x < 24.9) = P(z < -1.43) = 0.0764$
