The probability that A, B and C will live for more than 60 years is 12,13and1412,13and14 respectively. What is the probability that atleast 1 of them will be alive after 60 yrs of age?

• Correcting the question :- The probability that A, B and C will live for more than 60 years is 1/ 2, 1/3 and 1/4 respectively. What is the probability that atleast 1 of them will be alive after 60 yrs of age?
  
  Answer:-
  
  Probability that atleast 1 person is alive = 1 - (Probability that all will die)
  
  = 1 - ( Probability that A will die x Probability that B will die x Probability that C will die)
  
  = 1 - ( (1 -1/2) x ( 1- 1/3) x (1 - 1/4))
  
  = 1 - ( 1/2 x 2/3 x 3/4)
  
  = 1 - (1/4)
  
  ANS= 3/4
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