N no. of dice r thrown,getting 20 before 26 is 3/5,then wt will be the value of N.
option
A. 23
B. 29
C. 21
D. None of these

• for N=23,29,21 you cannot make a total score of 20. It will always be greater than 20. So answer is None of this.
• 11 years agoHelpfull: Yes(31) No(0)
• answer must be no of these because for the value given 3/5 let there be a common factor x
  
  this implies that the probability should be (3x)/(5x). and while solving for the value of N the total output should be 6 raised to N which comes in denominator and will be never a multiple of 5. and if it is multiple of then the outcomes desired, will not be integer value.
  
  overview needed for the solution given
  
  thank you
• 11 years agoHelpfull: Yes(9) No(2)
• We cannot get 20 if the no of dice are more than 20.. so answer is None of these
• 11 years agoHelpfull: Yes(2) No(0)
• we can't determine the value of N if we don't know the value of r
  so ans is D
• 11 years agoHelpfull: Yes(0) No(1)
• Nice
• 11 years agoHelpfull: Yes(0) No(1)