Answer:
760
Explanation:
You want to know the number of devices without defect if 3% of a day's production of 784 devices are defective.
Number defective
The number of defective devices produced in a day is expected to be ...
3% × 784 = 23.52 ≈ 24 . . . . devices
Number without defect
The number without defect will be the remaining number of devices:
784 -24 = 760
About 760 devices are without defect.