#### If an event cannot occur, then its probability is (A) 1                (B)$\frac{3}{4}$                     (C) $\frac{1}{2}$                   (D) 0

Solution.    Probability; probability means possibility. It is a branch of mathematics that deals with the occurrence of a random event. The value is expressed from zero to one
Here number of favorable cases is 0.

Probability = $\frac{Number \, of\, favourable\, case}{Total\, number\, of\, cases}$
Probability = $\frac{0}{\left ( Total\, cases \right )}= 0$