The sum of all natural numbers 'n' such that 100 < n < 200 and H.C.F. (91, n) > 1 is :

The sum of the series

2.²⁰C₀ + 5.²⁰C₁ + 8.²⁰C₂ + 11.²⁰C₃ + ... +62.²⁰C₂₀ is equal to :

Let A and B be two non-null events such that A $$ \subset $$ B . Then, which of the following statements is always correct?

The sum of the solutions of the equation
$$\left| {\sqrt x - 2} \right| + \sqrt x \left( {\sqrt x - 4} \right) + 2 = 0$$
(x > 0) is equal to: