abel ,loyla and sel are three channels , if 30% of the populatio watch abel , and 5% of the people watch any two of the channel, and 5% of the people watch none off the channel then the number of people watching all the three channels are?

• assume 100% people are there
  30% watch abel
  5% watch any two of the remaining
  5% watch none of the channels
  so i think 60% of the people watch all the three
• 12 years agoHelpfull: Yes(0) No(11)
• can someone solve this?
• 12 years agoHelpfull: Yes(0) No(4)
• assume A,B,C are channels. P(A)=0.3 INTERSECTIONS OF ANY TWO CHANNELS = 0.05
  PEOPLE WATCH ATLEAST ONE CHANNEL IS 1-0.05=0.95.
  now people watching all the three can be found by,
  0.95=0.3-3*0.05+ x
  x = 0.8.
  hence answer is 80 %.
• 10 years agoHelpfull: Yes(0) No(0)