Question

Mrs. Smith's reading class can read an average of 190 words per minute with a standard deviation of 20 words per minute. The top 3% of the class is to receive a special award. What is the minimum number of words per minute a student would need to read in order to get the award? Assume the data is normally distributed.

a. 228
b. 124
c. 226
d. 225

After four attempts on this one i kept getting different answers...can anyone lend a helping hand?
what have you tried?

You can play around with Z table stuff at
http://davidmlane.com/hyperstat/z_table.html

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