Final answer:
The effective yield to maturity of the zero-coupon bond is 5.72%.
Step-by-step explanation:
The effective yield to maturity can be calculated using the formula:
Yield to Maturity = (Face Value - Purchase Price) / Purchase Price
In this case, the face value of the bond is $2,050 and the purchase price is $305. Plugging these values into the formula gives us:
Yield to Maturity = ($2,050 - $305) / $305
= 5.72
Therefore, the effective yield to maturity is 5.72%.