Jamie is a quality control specialist. He is required to check 180 rubber balls out of a shipment of 18,000for defects. He finds that 3 are defective. Of the balls in the bin, he predicts there will be 300 balls defective. What percent if the rubber balls are not defective?
3/180 * 100%= % of defective balls
300/1800 *100%= % of defective balls
these two are the same (hence his prediction)
so
100% - % of defective balls = % of balls that are not defective
http://www.jiskha.com/display.cgi?id=1322784100
To find the percentage of rubber balls that are not defective, we need to determine the total number of non-defective balls and divide it by the total number of balls in the shipment. Here is how you can calculate it:
1. Start by finding the total number of non-defective balls. Since Jamie checked 180 balls and found that 3 were defective, we can subtract the defective ones from the total checked: 180 - 3 = 177 non-defective balls.
2. Next, we need to find the total number of balls in the shipment. According to the problem, the shipment contains 18,000 balls.
3. To calculate the percentage of non-defective balls, divide the number of non-defective balls by the total number of balls in the shipment: (177 / 18,000) x 100 = 0.98%
Therefore, approximately 0.98% of the rubber balls are not defective.