question_answer

A box contains 20 electric bulbs, out of which 4 are defective. One bulb is chosen at random from this box. The probability of getting a defective bulb is

A) \[\frac{4}{5}\]                          

B) \[\frac{1}{5}\]              

C) \[\frac{7}{20}\]             

D)        \[\frac{11}{20}\]