N no of dice are thrown the probability of getting a sum of 40 before 56 is 2/7 then what may be the value of N
option
A. 21
B. 22
C. 24
D. cant determine

• since the denominator in the throw of dice= sample space=6^N thus 6^N=multiple of 7 thus ans = 21
  
• 10 years agoHelpfull: Yes(13) No(4)
• 6^N is not multiple of 7.... isnt it? samarth...
  
• 10 years agoHelpfull: Yes(6) No(0)
• Please explain
• 10 years agoHelpfull: Yes(2) No(1)
• please write the solution
• 10 years agoHelpfull: Yes(1) No(0)
• 40 = 3*9+1*13
  9 die should come up with 3, and 13 die should come up with 1.
  therefore, N=9+13=22.
• 10 years agoHelpfull: Yes(0) No(0)