Imagine Rahul scores 85 in Maths and 80 in English. It looks like Rahul is better at Maths than English. But there's a catch. The class average in Maths is 90, while that in English is 70. That means he scored below average in Maths but well above average in English. So what is his real strength? Maths, his highest score, or English, where he outperformed his friends? Think about the subject his friends would ask him doubts about more often.