2. Calculation formula of passing rate: passing rate = number of people passing ÷ total number of people × 100%.
3. Calculation formula of the correct rate: correct rate = correct number ÷ total number × 100%.
Extended data:
1. Because every process on the production line may produce defects, some defects can be repaired by rework, so the final pass rate cannot reflect the losses caused by rework of intermediate processes. Therefore, the concept of circulation qualification rate is put forward.
The qualified rate in the process of product production is divided into: circulation qualified rate and final qualified rate.
Circulation pass rate:
1. A company has 22 qualified products and 3 unqualified products. What's the pass rate?
2. In a batch of products, the qualified rate was 58%, and 200 products were tested. How many products are qualified?
3. After testing by law enforcement departments, there are 800 products in a batch, of which only 10 is qualified. What's the pass rate?
explain
1, with a total product of 22+3=25 (pieces) and 22 pieces qualified. According to the formula, the qualified rate is 22÷25× 100%=88%.
2. Qualified products account for 58% of all tested products, so the qualified products are 200×58%= 1 16 (pieces).
3. This problem can be formulated directly, and the pass rate is only10 ÷ 800×100% =1.25%.