Jenny's average annual income over a 4-year period was $25,000. ?

Question

Jenny's average annual income over a 4-year period was $25,000. What would her average annual income have to be for the next 3 years so that her average annual income over the 7-year period would be $50,000?

Answer 1

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For the average over 7 years to be 50,000 the total would be

t = 7 * 50000

t = 350000

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Amount earned over 4 years at 25000

a = 4 * 25000

a = 100000

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earnings needed over three years

e = 350000 - 100000

e = 250000

needed average annual income

n = 250000/3

n ≈ 83,333

$83,333 <––––