In 1999, the average charge for tax preparation by H&R Block, Inc. was $84.57. Assuming a normal

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In 1999, the average charge for tax preparation by H&R Block, Inc. was $84.57. Assuming a normal distribution and a standard deviation of σ = $10, what proportion of H&R Block’s tax preparation fees were 

a. More than $84.57?
b. Between $64.57 and $104.57?
c. Between $74.57 and $94.57?
d. More than $104.57?

Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...
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