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October 4, 2023UGC NET CS 2014 June-paper-3
October 4, 2023NIC-NIELIT Scientist-B 2020
| Question 9 |
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:
| 18 | |
| 19 | |
| 20 | |
| 21 |
Question 9 Explanation:
1G 5R → 6 ways
2G 4R → 5 ways
3G 3R → 4 ways
4G 2R → 3 ways
5G 1R → 2 ways
6G 0R → 1 way
Total = 21 ways
Correct Answer: D
Question 9 Explanation:
1G 5R → 6 ways
2G 4R → 5 ways
3G 3R → 4 ways
4G 2R → 3 ways
5G 1R → 2 ways
6G 0R → 1 way
Total = 21 ways
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