Find **WBJEE 2015 Solved Mathematics Question Paper – Part 9** in this article. This paper consists of 5 questions (#76 to #80) from WBJEE 2015 Mathematics paper. Detailed solution of these questions has been provided so that students can match their solutions.

**Importance of Previous Years’ Paper:**

Previous years’ question papers help aspirants in understanding exam pattern, question format, important topics and assessing preparation. It has also been seen that sometimes questions are repeated in WBJEE Exam. So, this paper will certainly boost your confidence.

**About WBJEE Exam**

WBJEE is a common entrance examinations held at state level for admission to the Undergraduate Level Engineering and Medical courses in the State of West Bengal. The WBJEE engineering entrance exam has two sections – Mathematics, Physics and Chemistry. The Mathematics section of WBJEE 2015 engineering entrance exam consists of 80 questions.

**77.** Let 16 *x*^{2} – 3*y*^{2} – 32*x* – 12*y* = 44 represent a hyperbola. Then,

**WBJEE 2016 Solved Physics and Chemistry Question Paper**

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**80.** A relation *ρ* on the set of real number *R* is defined as follows:

*x ρ y* if and only if *xy* > 0. Then which of the followings is/are true?

(A) *ρ* is reflexive and symmetric

(B) *ρ* is symmetric but not reflexive

(C) *ρ* is symmetric and transitive

(D) *ρ* is an equivalence relation

**Ans : (B, C)**

**Sol.**

For reflexivity,