Maths Quiz - Class 12th

If A is a square matrix of 3 x 3 order, where |A| = 3, then find out the value of |adjA|.

• 3

• 9

• 30

• 1/3

If A and B are two events, where P (A) = 0.2, P (B) = 0.4 and P(A ∪ B) = 0.5. Find the value of P(A/B).

• 0.25

• 0.08

• 0.1

• 0.080

Which point does not lie in the half-plane for the given equation: 2x + 3y - 12 ≤ 0?

• (2,3)

• (-3,2)

• (1,2)

• (2,1)

Find the value of cos^-1 x + cos^-1 y, if sin^-1 x + sin^-1 y = 2π/ 3.

• 2π/3

• π

• π/2

• π/3

Calculate the distance in units between the below-mentioned planes: 3x + 5y + 7z = 3 and 9x + 15y + 21z = 9.

• 3

• 7

• 0

• 6