A calculator manufacturing company checks 500 calculator units, and 25 of them have non-functioning keys. Approximate the relative frequency of a non-defective unit from this batch of items. Express your answer in the simplest form of a fraction.(1 point) Responses 25500 Start Fraction 25 over 500 End Fraction 1920 Start Fraction 19 over 20 Endfraction 475500 Startfraction 475 over 500 End Fraction 120
Start Fraction 475 over 500 End Fraction
The relative frequency of a non-defective unit can be calculated by subtracting the frequency of defective units from the total number of units, and then dividing by the total number of units.
Relative frequency = (500 - 25) / 500
Relative frequency = 475 / 500
Relative frequency = Start Fraction 475 over 500 End Fraction
Therefore, the relative frequency of a non-defective unit is Start Fraction 475 over 500 End Fraction.