There are 6 boxes numbered 1, 2,...6. Each box is to be filled up either with a red or a green ball
in such a way that at least 1 box contains a green ball and the boxes containing green balls are
consecutively numbered. The total number of ways in which this can be done is
(A) 5 (B) 21
(C) 33 (D) 60
(E) 40

• 21 ways.
• 14 years agoHelpfull: Yes(3) No(1)
• ans: 21
  Total number of options = 6 + 5 + 4 + 3 + 2 + 1 = 21.
  
  
• 13 years agoHelpfull: Yes(3) No(1)
• B:21
• 13 years agoHelpfull: Yes(2) No(1)
• 21
• 13 years agoHelpfull: Yes(1) No(1)
• B answer 21
• 7 years agoHelpfull: Yes(0) No(0)