Answer
$P(X\gt55)=0.2033$
Work Step by Step
Let's find the z-score for 55:
$z=\frac{X-μ}{σ}=\frac{55-50}{6}=0.83$
According to Table V, the area of the standard normal curve to the left of z-score equal to 0.83 is 0.7967.
But, we want the area of the standard normal curve to the right of z-score equal to 0.83:
$1-0.7967=0.2033$
