MCQOPTIONS
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| 1. |
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. | 18 |
| B. | 19 |
| C. | 20 |
| D. | 21 |
| Answer» E. | |