One would assume Chandra is OCP 8i, hence the question about the passing score for the 9i upgrade exam. So Chandra, being an OCP type of person, should have already known about http://education.oracle.com and, and stating "70 percent. 37 out of 53 questions" is only a guideline, not a statement of fact.
Pando already answered what was asked, but to clear up any misconceptions about hard and fast scores to pass, see the following.
OCP Exam Passing Scores
Oracle routinely publishes new versions of Oracle Certification exams, and the passing score across versions may differ. The passing score for each exam is set independently to maintain a consistent standard across versions. For example, to maintain a consistent standard for success, a new version of an exam which contains more hard questions than the prior version will be assigned a somewhat lower required passing score. For this reason, passing scores may vary between different exams in your certification track, and between later and earlier versions of the same exam.
The passing scores provided on the Oracle Certification Program website are for informational purposes only. Oracle does not recommend an exam preparation strategy targeting the passing score, because passing scores are subject to change.