A calculator manufacturing company checks 500 calculator units and find that 25 of them have non-functioning keys what is the related to frequency of a non-defected calculator from this b a t c h or items a 475/500 b19 over 20 c one over 20 d 25/500
To find the fraction of non-defective calculators in the batch, we need to subtract the number of defective calculators from the total number of calculators and then divide by the total number of calculators.
Non-defective calculators in the batch = Total calculators - Defective calculators
Non-defective calculators = 500 - 25
Non-defective calculators = 475
Fraction of non-defective calculators in the batch = Non-defective calculators / Total calculators
Fraction of non-defective calculators = 475 / 500
Therefore, the fraction of non-defective calculators in the batch is 475/500, which is option a.