# CBSE Class 12 Mathematics Practice Paper Pre-Board 2015

Nov 11, 2014 14:45 IST

Find CBSE Class 12 Mathematics Practice Paper for Pre-Board 2015. This paper is a collection of questions from the previous year question papers, along with fresh new questions and has been framed keeping the Students' perspective in mind. This will help the Students by building a sound concept before their Pre-Board Examination.

Q. Write the differential equation representing the family of curves y = mx, where m is an arbitrary constant.

Q. If a line has direction ratios 2, –1, –2; then what are its direction cosines?

Q. Let * be a binary operation on N given by a*b = LCM (a, b) for all a, b ϵ N. Find 5*7.

Q. A company has two plants to manufacture scooters. Plant I manufactures 70% of the scooters and Plant II manufactures 30%. At Plant I, 80% of the scooters are rated as of standard quality and at Plant II, 90% of the scooters are rated as of standard quality. A scooter is chosen at random and is found to be of standard quality. What is the probability that it has come from Plant II?

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