a company produces computer batteries. everyday, the company produces exactly 500 batteries. to keep track…
a company produces computer batteries. everyday, the company produces exactly 500 batteries. to keep track of how many batteries are defective, a worker tested a box of batteries. the results are in the table below.\n| working batteries | defective batteries | total |\n| ---- | ---- | ---- |\n| 17 | 3 | 20 |\nusing these results, about how many batteries each day would be defective?\no 3\no 25\no 75\no 425
Answer
Explanation:
Step1: Calculate the defect - rate
The defect - rate is calculated by dividing the number of defective batteries in the sample by the total number of batteries in the sample. In the sample, there are 3 defective batteries out of 20 total batteries. So the defect - rate $r=\frac{3}{20}$.
Step2: Estimate the number of defective batteries per day
The company produces 500 batteries per day. To find the estimated number of defective batteries per day $n$, we multiply the total number of batteries produced per day by the defect - rate. So $n = 500\times\frac{3}{20}$. $n=\frac{500\times3}{20}=\frac{1500}{20}=75$.
Answer:
75