tere are 4 boxes coloured red,yellow,green,blue. if 2 boxes are selected. how many combinations are there for atleast one green box or red box to be selected

• (green+blue,green+yellow,green+red,red+yellow,red+blue)
  total 5 combination are there(ans)
• 12 years agoHelpfull: Yes(27) No(2)
• atleast one green or one red means "one box must be green AND one box is other" OR " one box must be red AND one box is other" =(1c1*3c1)+(1c1*3c1)=3+3=6
• 12 years agoHelpfull: Yes(2) No(4)
• combinations are
  (r,y),(r,g),(r,g),(r,b),(y,g),(y,b),(g,b)
  ans is 5
• 12 years agoHelpfull: Yes(2) No(0)
• But guys in question it is mentioned the 'atleast' word so the combinations(r,r and g,g) are possible too!
• 10 years agoHelpfull: Yes(1) No(0)
• Sorry I did not notice that there is only one ball available of each color so the combinations(r,r and g,g) are not possible!
• 10 years agoHelpfull: Yes(1) No(0)