Answer:
PMT x {[(1+r)n – 1] / r}
Explanation:
Ordinary annuity is the payment or receipt of fixed amount for a specified time starting at the end of the first period of payment. The basic equation used for the calculation of future value of an ordinary annuity is PMT x {[(1+r)n – 1] / r}. As compounding effect all the monthly payment is dealt only this Equation. Other equation are for perpetuity, present value of annuity and Future value of advance annuity.