A school has four classes. They have 10, 20, 30 and 40 students respectively. Students' pass percentage is 20%, 30%, 60% and 100%. What is the pass percentage of the entire school?
Q1. A school has four classes. They have 10, 20, 30 and 40 students respectively. Students' pass percentage is 20%, 30%, 60% and 100%. What is the pass percentage of the entire school?
Answer: 66%
Explanation: The correct value is 66%. Apply the formula or arithmetic step shown in the question and