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  Home  SAT (Scholastic Aptitude Test)

⟩ 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

1. 5

2. 21

3. 33

4. 60

Ans : B

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