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.

Answer 1

To calculate the relative frequency of a non-defective unit, we first need to determine the number of non-defective units in the batch.

Number of non-defective units = Total units - Defective units
Number of non-defective units = 500 - 25
Number of non-defective units = 475

Now, we can calculate the relative frequency of a non-defective unit by dividing the number of non-defective units by the total number of units:

Relative frequency of non-defective unit = Number of non-defective units / Total units
Relative frequency of non-defective unit = 475 / 500
Relative frequency of non-defective unit = 0.95 or 95%

Therefore, the relative frequency of a non-defective unit from this batch of items is approximately 95%.