Probabily question

[Guest]

A machine makes washers with a mean diameter of 0.5 inch and a standard deviation of 0.04 inch. Assuming normality, what is the probability that a washer picked at random will have a diameter

a) > 0.54 inch?
b) > 0.62 inch?
c) < 0.46 inch?
d) > 0.46 inch?

 

[Unco]

This is what you need to know how to do before you attempt your other questions.

Check out Galactus's beautiful post for help on this one.

 

[Guest]

thank you

so much