15. which of the following statements is not true regarding folk music?
i) The concept of audience as a separate entity is not emphasised in folk music.
ii) Themes, instruments and melodies used in folk music are simple.
iii) Folk music has greatly influenced the classical music.
iv) Movie and pop music have weakened the popularity of folk music.
Out of 100 people, 40 like rock music and 60 don't. The probability of picking a person who likes rock music will be?