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According to the retail electronics chain, adults in 40 to 50 year old age group, the mean amount spent per year on electronics is $1998. Assume that the amount spent follows a normal distribution with a standard deviation of $550.

a. What percent of adults in this age group spend more than $2500 per year on electronics?

b. What percent spend between $2500 and $3000?

c. What percent spend less than $2000?

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