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 information If the test scores of a group of four people are as shown in the above figure, the total score is 100, and the test scores are 80 points, then:
The qualified rate of this group is: 1÷4× 100%=25%.
The pass rate of this group is 3÷4× 100%=75%.
The correct rate of coolness is 99100×100% = 99%.