there are 12 in a refridgelator out of which there are 7 blue bottles and 5 red bottles in how many ways can we take out bottles from the fridge such that atleast one blue and one red bottle is in the fridge

• if ques is to take 8 bottles out of 12 then,leaving at least 1 red and
  1 blue bottle in the fridge.no. of ways to select ,
  7c6*5c2 + 7c5*5c3 + 7c4*5c4
  ans=455
  
  
• 10 years agoHelpfull: Yes(30) No(3)
• take 8 bottle from fridge out of 12 bottles in 8 bottle least 1 red
  
  ways= 7c3*5c5 + 7c4*5c4 + 7c5*5c3 + 7c6*5c2 + 7c7*5c1
• 10 years agoHelpfull: Yes(15) No(9)
• Answer=493.
  The question was to take 8 bottles out of 12 bottles leaving at least 1 red and
  1 blue bottle in the fridge.
  so answer is, 12c8-2=493.
  because two combinations are exceptions.
  in one,7 blue + 2 red,leaving zero blue bottles in fridge.
  in another,5 red + 3 blue,leaving zero red bottles in fridge.Right?.
• 10 years agoHelpfull: Yes(7) No(8)
• take 8 bottle from fridge out of 12 bottles in 8 bottle least 1 red and is done
  ways=12c8=495
  
• 10 years agoHelpfull: Yes(2) No(6)
• incomplete question
  guys upload correct ques
  here "8 bottle " is missing
• 10 years agoHelpfull: Yes(2) No(0)
• 7c6.5c4=35
• 10 years agoHelpfull: Yes(1) No(6)
• 7c1x5c1+7c2*5c2+7c3*5c3+7c4*5c4+7c5*5c5
  
• 10 years agoHelpfull: Yes(1) No(4)
• that is not 7 blue+2red,but 7 blue+ 1red.
• 10 years agoHelpfull: Yes(1) No(1)
• galat qus ka ans kaise nikal lete ho ....jo bhi h 8 mention in question
• 8 years agoHelpfull: Yes(1) No(0)
• we should have atleast one blue and one red in refregirator so..
  12-2=10(total bottles)
  7-1=6(blue)
  5-1=4(red)
  10c6*10c4
  =2*10c4=420
• 10 years agoHelpfull: Yes(0) No(2)
• Ways to pick 4 cans so that at least one red and at least one blue cans to remain the refrigerator =
  total ways to pick 4 can out of 12 - ways to pick 4 red out of 7 red - ways to pick 4 blue out of 5 blue
  
  12C4−7C4−5C4=495−35−5=45512C4−7C4−5C4=495−35−5=455
  
• 8 years agoHelpfull: Yes(0) No(0)
• AS=(d1+d2)/s1+s2
  =2d/d(1/s1 +1/s2)
  d gets cancel
  You get =2/(1/s1 + 1/s2)
  
  
• 8 years agoHelpfull: Yes(0) No(1)
• 56 hffxhfswr
• 7 years agoHelpfull: Yes(0) No(0)