27% of the papers with the highest scores = lowest score = 10. When H=8, L=3, for item No. 10. What is the index of difficulty for item No. 10?

سب سے زیادہ اسکور والے 27% پیپرز = سب سے کم اسکور = 10۔ جب H=8، L=3، آئٹم نمبر 10 کے لیے۔ آئٹم نمبر 10 کے لیے مشکل کا اشاریہ کیا ہے؟
Answer: 0.625
Explanation

The index of difficulty (P) for item No. 10 is calculated as:

P= H−L/H = 8−3/8 = 5/8

P=0.625

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