what is the probability of getting 5 before 7 while 3 dice r thrown?

• p(5)=6;
  p(7)=15;
  n(s)=6+15=21;
  p=6/21=2/7;
  
• 11 years agoHelpfull: Yes(25) No(2)
• p(5)/[p(5)+p(7)]=2/7
• 11 years agoHelpfull: Yes(5) No(0)
• let one boy one day work=x
  one men one day work=(x+x/2)
  atq x+x/2=1/240
  x=1/80
  then 4 men 9 boy one day work=4*1/160+9*1/240
  ==1/16
  so 16 day is the ans
  
• 11 years agoHelpfull: Yes(2) No(2)
• total no of events is 216
  event of gettin 5 before 7 is 6 i.e.(1,1,3),(1,3,1),(3,1,1),(2,2,1),(2,1,2),(1,2,2)
  probability is 6/216
• 11 years agoHelpfull: Yes(1) No(7)
• p(5)=6;
  p(7)=12;
  n(s)=6+12=18;
  p=6/18=1/3;
• 11 years agoHelpfull: Yes(1) No(2)
• wht is the formula for finding p(5) or p(7) in these types of questions ??? coz counting doesnt help much if dice no is large say 4 or 5??
• 11 years agoHelpfull: Yes(0) No(0)
• p(5) = 6,
  
  p(7) =15
  
  n(s) = 6+ 15 = 21;
  
  p = 6/21= 2/7 ans.
• 11 years agoHelpfull: Yes(0) No(0)