There are 20 balls which are red,blue or green.if 7 balls are green and the sum of red and green balls is less than 13,at most how many red balls are there?
4
5
6
7

• At most 5 red balls are there
  because there are 7 green balls
  and
  the sum of red and green balls is less than 13.
• 12 years agoHelpfull: Yes(4) No(0)
• Answer is 5.
  7 balls are green and the sum of red and green balls is less than 13. i.e. red + green < 13, but 7 balls are green. i.e. red balls < 6.
• 12 years agoHelpfull: Yes(2) No(1)
• less thn 13 means 1 to 12
  hence already 7 green balls are ther ,remaining are the red balls so ans is 5
• 12 years agoHelpfull: Yes(1) No(2)