A calculator manufacturing company checks 500 calculator units and finds that 25 of them have non-functioning keys. What is the relative frequency of a non-defective calculator from this batch of items? Write your answer in simplest terms.

Question

A calculator manufacturing company checks 500 calculator units and finds that 25 of them have non-functioning keys. What is the relative frequency of a non-defective calculator from this batch of items? Write your answer in simplest terms.

Answer 1

The relative frequency of a non-defective calculator can be calculated by subtracting the number of defective calculators from the total number of calculators checked and then dividing by the total number of calculators checked.

Total calculators checked = 500
Defective calculators = 25
Non-defective calculators = 500 - 25 = 475

Relative frequency of a non-defective calculator = 475 / 500 = 19 / 20

Therefore, the relative frequency of a non-defective calculator from this batch of items is 19/20.

Answer 2

is this correct

Answer 3

Yes, this is correct. The relative frequency of a non-defective calculator from the batch of 500 checked is indeed 19/20. This means that approximately 95% of the calculators in the batch are functioning properly.