AP EAPCET 19-Aug-2021 Shift 1 Paper

Total number of ways of dividing n identical rings to r different girls, so that every girl gets at least one ring =‌n−1Cr−1
Here, we have to distribut 8 identical rings to 3 different girls.
This can be done in ‌8−1C3−1=‌7C,=

7×6

1×2

=21 ways