Sandy,
I wouldn't go for the exam with the scores that you mention,
and having given the exam I feel, you can work a little more
to be there at 80% or so, bill brodgen's
test is tougher than
the real exam, but it makes u think a lot more, and to me, that
kind of qstns helped me in the real exam.
Not to say you wouldn't pass with the current scores, I barely passsed in Bill's test ( I was not well when I took the test though), got around 88% in Green's tests, almost never crossed 90% in mocks but got 93% in real one, bcos I was more alert in
the real one.
all the best.