Final answer:
The present value of your son's private school education, considering an annual tuition increase and a matching interest rate, is approximately $137,900.
Step-by-step explanation:
The present value of your son's education can be calculated using the formula for the present value of a growing annuity. Given that tuition starts at $12,000, increases at an average rate of 6% per year, and the current interest rate is also 6%, we use the following formula:
PV = C × {1 - [(1 + g)/(1 + r)]ⁿ} / (r - g)
Where:
C is the initial tuition cost
g is the growth rate of tuition
r is the interest rate
n is the number of years
Plugging the values into the formula, we get:
PV = 12,000 × {1 - [(1 + 0.06)/(1 + 0.06)]¹³} / (0.06 - 0.06)
Since g is equal to r, the formula above simplifies, and we use a different approach for calculating PV when g = r:
PV = C × [ n / (1 + r)]
Therefore:
PV = 12,000 × (13 / (1 + 0.06))
This calculates to a present value close to $137,900, which is one of the options provided.