AP EAPCET 24-Aug-2021 Shift 1 Paper

Statement I The number of ways of distributing 10 identical balls in 4 distinct boxes such that no box is empty is ‌9C3.
∵n identical things can be distributed to different boxes by ‌n−1Cr−1 ways such that no box is empty.
10 identical balls can be distributed to 4 distinct boxes by ‌10−1C4−1 ways
i.e. ‌9C3 ways
Statement II The number of ways of choosing 3 places from 9 different places is ‌9C3 (true)
∴ Statement I is true statement II is true.
statement II is nor a correct explanation for statement I.