TS EAMCET 6-Aug-2021 Shift 2 Question Paper

The total number of ways selecting 3 girls from 15 girls seat around a round table is ‌15C3.
Now, number of ways selecting 3 girls who sit together at one place is 15 . So, required number of ways =‌15C3−15
‌‌=‌

15×14×13

3×2

−15
‌‌=35×13−15
‌‌=455−15=440