there are 20 balls which are red ,blue or green. If & balls are green and the sum of red balls and green balls is less than 13,at most how many red balls are there?
a)4
b)5
c)6
d)7

• ans is b)5
  here g+r+b=20
  and g=7
  so g+r
• 12 years agoHelpfull: Yes(6) No(0)
• problem in posting ans,ans is atmost 4 because green is 8 balls
• 12 years agoHelpfull: Yes(5) No(2)
• sum of red balls and green balls is less than 13,
  it means sum of red balls and green balls is up to 12 only.
  
  then number of red balls will depend on number of green balls.
  Here there seems to be typing problem in statement.
  
  If there are 8 green balls, then red balls can be four only.
  If there are 7 green balls, then red balls can be four or five and hence at most 5 red balls can be there.
  If there are 6 green balls, then red balls can be four, five or 6 and hence at most 6 red balls can be there.
  
• 12 years agoHelpfull: Yes(3) No(4)
• frns here the &=7(typing mistake) ie., here there are 7 green balls ....so, r+g
• 12 years agoHelpfull: Yes(3) No(1)
• IF THERE ARE 7 GREEN BALLS THEN ATMOST 5 BALLS,BECAUSE GREEN+RED
• 12 years agoHelpfull: Yes(1) No(0)
• there are total 20 balls which are red,blue,green
  now 8 balls are green
  sum of red balls and green balls is less than 13 means
  green+red
• 12 years agoHelpfull: Yes(0) No(2)
• g+r
• 12 years agoHelpfull: Yes(0) No(2)
• red+green
• 12 years agoHelpfull: Yes(0) No(2)
• green=g,red=r
  g=8
  g+r
• 12 years agoHelpfull: Yes(0) No(0)
• gn:
  r+g+b=20
  r+gr=4
• 12 years agoHelpfull: Yes(0) No(1)
• its d bcoz g+r
• 12 years agoHelpfull: Yes(0) No(1)
• g=7
  g+r
• 12 years agoHelpfull: Yes(0) No(1)