WBJEE Mathematics Question Paper with Answer Keys 2019 Download Free PDF
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WBJEE Mathematics Question Paper 2019 Download
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Q.1. Let the relation p be defined on R as aρb iff l + ab > 0. Then
A. ρ is reflexive only
B. ρ is equivalence relation
C. ρ is reflexive and transitive but not symmetric
D. ρ is reflexive and symmetric but not transitive
Q.2. If X is a random variable such that σ(X) = 2.6, then σ(1 – 4X) is equal to,
B. – 10.4
Q.3. The angles of a triangle are in the ratio 2:3:7 and the radius of the circumscribed circle is 10 cm. The length of the smallest side is
A. 2 cm
B. 5 cm
C. 7 cm
D. 10 cm
Q.4. The equation of the plane, which bisects the line joining the points (1, 2, 3) and (3, 4, 5) at right angles is,
A. x+ y + z = 0
B. x+ y – z = 9
C. x+ y + z = 9
D. x+ y – z + 9 = 0
Q.5. If the radius of a spherical ballon increases by 0.1%, then its volume increases approximately by
WBJEE Mathematics Question Paper 2019 with Answer Keys