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...? Mcqs

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...?

(A) 0.125

(B) 1.411

(C) 0.225

(D) 0.625

Source: This question is taken from the Pedagogy