Any help would be greatly appreciated Thanks Assume that a r

Assume that a researcher randomly selects 14c newborn babies and counts the number of girls selected. The probabilities corresponding to the 14 possible values of x are summarized in the given table. Answer the question using the table. The weekly salaries of teachers in one state are normally distributed with a mean of $490 and a standard deviation of $45. What is the probability that a randomly selected teacher earns, more than $525 a week?

Solution

Normal Distribution
Mean ( u ) =490
Standard Deviation ( sd )=45
Normal Distribution = Z= X- u / sd ~ N(0,1)                  
P(X > 525) = (525-490)/45
= 35/45 = 0.7778
= P ( Z >0.778) From Standard Normal Table
= 0.2177