If A1 , A2  and A3  are three independent events with P(A1 ) = 1/3, P(A2 ) = 1/4 and P(A3 ) = 2/5, then the probability that exactly one of the events occurs is :

  • 3/20
  • 1/10
  •  9/20
  • 3/10
 If A1 , A2  and A3  are three independent events 
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