1/w = p(1/w1) + (1-p)(1/w2)
Multiply both sides by w1w2:
w1w2/w = p(w1w2/w1) + (1-p)(w1w2/w2)
w1w2/w = p(w2)+(1-p)(w1)
Multiply both side by w:
w1w2 = w[p(w2)+(1-p)(w1)]
Divide both sides by [p(w2)+(1-p)(w1)]:
w = (w1w2)/[p(w2)+(1-p)(w1)]
Last edited by a moderator: Mar 23, 2007