576: A person has 4 coins each of different denomination. What is the number of different sums of money the person can form (using one or more coins at a time)?
(A) 15
(B) 16
(C) 10
(D) 12
577: Who among the following is Chile's First woman President ?
(a) M. Bachelet
(b) E. Morales
(c) A. Garcia
(d) D. Ortege
578: The offending substance in the liquor tragedies leading to blindness, etc. is
(a) ethyl alcohol
(b) amyl alcohol
(c) benzyl alcohol
(d) methyl alcohol
579: Which one of the following satisfies the relationship
D d a : a D D : : R r b : ?
(a) D D A
(b) R R R
(c) b R R
(d) B B r
580: What does the term Dolby B, or Dolby C printed on tape recorders and other sound system refer to?
(a) Frequency modulated system
(b) Amplitude modulated system
(c) Noise reduction circuit
(d) Both DC and AC power can be used.