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Finding the missing rate on an annuity?

I can not seem to solve this. The lottery jackpot is $ 363 million. One lump sum payout gives roughly 50% of the published value. The annuity payments option gives equal installments over 26 years. Can anyone help me solve for the rate please? I am simply attempting to prove that the $363 million is not an accurate description of the actual amount that can be won.

1 Answer

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  • Anonymous
    1 decade ago
    Favorite Answer

    Let P = payment = 363 / 26 (in millions)

    Let r = interest rate

    Let A = amount received as lump sum

    Let n = number of years in payments (i.e., 26)

    A = P (1+r) (1 - (1+r)^-26) / r

    Solve for r

    It will be something around 6%

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