Question: In 2009 the average charge for tax preparation by H R

In 2009, the average charge for tax preparation by H&R Block, Inc. was $187. Assuming a normal distribution and a standard deviation of σ = $20, what proportion of H&R Block’s tax preparation fees were
a. more than $187?
b. between $147 and $227?
c. between $167 and $207?
d. more than $227?

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  • CreatedSeptember 08, 2015
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