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In a locality, two-thirds of the people have cable-TV, one-fifth have VCR, and one-tenth have both, what is the fraction of people having either cable TV or VCR?

  1. $19/30$ 
  2. $3/5$
  3. $17/30$ 
  4. $23/30$

1 Answer

1 1 vote

Fraction of people who watch cable tv only= (2/3 - 1/10) = 17/30

Fraction of people who watch VCR only = (1/5 - 1/10) = 1/10

Therefore fraction of people who watch either cable or vcr = 17/30 + 1/10 =  20/30 = 2/3

So 2/3 is the Correct answer.

 

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