When a die is cast with numbering on its faces, as shown, the ratio of the probability of getting a composite number to the probability of getting a prime number is …………… .

1. 2 : 3

2. 3 : 2

3. 1 : 3

4. 1 : 2

Given, a₁, a₂, a₃, ….. and b₁, b₂, b₃, ….. are real numbers such that a₁ - b₁ = a₂ - b₂ = a₃ - b₃ = ……… are all equal.

a₁ - b₁, a₂ - b₂, a₃ - b₃, …….. forms a ……… progression.

1. Geometric (r = 1)

2. Arithmetic (d = 1)

3. Geometric (r < 1)

4. Arithmetic (d = 0)

The point of concurrence of the angle bisectors of a triangle is called the …………… of the triangle.

1. centroid

2. incenter

3. circumcenter

4. orthocenter