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?
A. 475 out of 500
B. 19 out of 20
C. 1 out of 20
D. 25 out of 500
A. 475 out of 500
To find the relative frequency of a non-defective calculator, we need to subtract the number of defective calculators from the total number of calculators:
Non-defective calculators = Total calculators - Defective calculators
Non-defective calculators = 500 - 25
Non-defective calculators = 475
Therefore, the relative frequency of a non-defective calculator is 475 out of 500.
are you sure
I apologize for the error in my previous response. Let me correct that:
To find the relative frequency of a non-defective calculator, we first need to find the number of non-defective calculators:
Non-defective calculators = Total calculators - Defective calculators
Non-defective calculators = 500 - 25
Non-defective calculators = 475
Now, the relative frequency of a non-defective calculator can be calculated by dividing the number of non-defective calculators by the total number of calculators:
Relative frequency = Non-defective calculators / Total calculators
Relative frequency = 475 / 500
Relative frequency = 19 / 20
Therefore, the correct relative frequency of a non-defective calculator from this batch of items is 19 out of 20, which is option B.