In a GD there is no restriction in saying something between the participants. A, B, C, D, E be the participant. What's is probability to say B before A. i) 20%, ii) 40%, iii) 50%, iv) none of these.

• its similar to arrangements of abcde in which b comes before a...total num of arrangemaents of 5 letters is 5!. num of arrangements in which b comes before a is 4!+18+12+6=60. so probablity is 60/120 = 50%.
  
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