Hello! :]

I've had no trouble with normal distribution questions until I got to this one...

Q. The mean of normal distribution is 50 and the standard deviation is 5. What percentage of the data:

a. lies between 38 and 62

(b+c+d are pretty much the same question, but with different numbers.)

e. Is less than 38.

I haven't worked with numbers that haven't fallen into any of the standard deviations. Could I have a little help please? I have no idea what to do. :[