0 0 votes There are $6$ boxes numbered $1, 2, \dots,6.$ Each box is to be filled up with a red or green ball in such a way that at least one 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 $5$ $21$ $33$ $60$ Quantitative Aptitude cat2003-1 quantitative-aptitude permutation-combination + – go_editor 14.2k points 1.2k views answer comment Share Follow Print 0 reply Please log in or register to add a comment.