(A) ΣPn(Po + Pn)/ΣPn(Po + Pn)
(B) ΣPn(qo + qn)/ΣPn
(C) ΣPn(Po + Pn)/ΣPn(Po + Pn) x100
(D) Non of these
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(A) ΣPn(Po + Pn)/ΣPn(Po + Pn)
(B) ΣPn(qo + qn)/ΣPn
(C) ΣPn(Po + Pn)/ΣPn(Po + Pn) x100
(D) Non of these