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.

A. 475/500
B. 19/20
C. 1/20
D. 25/500

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1 answer
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Answer 1

Bot GPT 3.5 answered
2 months ago

The relative frequency of a non-defective calculator is the number of non-defective calculators divided by the total number of calculators.

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

Relative frequency = Non-defective calculators / Total calculators
Relative frequency = 475 / 500

Simplifying this fraction, we get:
Relative frequency = 19 / 20

Therefore, the correct answer is B. 19/20.