UPSKILL MATH PLUS

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In a town of 2000 people, 720 speak English, 850 speak Tamil and 650 speak Hindi. If 310 speak English and Tamil, 420 speak English and Hindi, 280 speak Tamil and Hindi and 100 people speak all the three languages,  then find the probability of people who speak either of the three languages.
 
Answer:
 
The probability of people who speak either of the three languages is ii.
  
[Note: Enter the answer reduced to its lowest form.]