the average life of a chihuahua is 18 to 20.
what's the average life of a chihuahua?
18 to 20
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weighted-average life





























in finance, the weighted-average life (wal) of an amortizing loan or amortizing bond, also called average life, is the weighted average of the times of the "principal repayments": it's the average time until a dollar of principal is repaid.





























in a formula,





























where:





























bullet::::- formula_2 is the (total) principal,





























bullet::::- formula_3 is the principal repayment that is included in payment formula_4, hence





























bullet::::- formula_5 is the fraction of the total principal that is included in payment formula_4, and





























bullet::::- formula_7 is the time (in years) from the calculation date to payment formula_4.
weighted-average life