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73. There are 10 stations on a circular path. A train has to stop at 3 stations such that no two stations are adjacent. The number of such selections must be (a) 50 (c) 70 (b) 60 (d) 80 |
| Answer» 73. There are 10 stations on a circular path. A train has to stop at 3 stations such that no two stations are adjacent. The number of such selections must be (a) 50 (c) 70 (b) 60 (d) 80 | |