Number of ways in which 19 indistinguishable books be packaged into 3 numbered boxes if no box may be empty, is

Question

Number of ways in which 19 indistinguishable books be packaged into 3 numbered boxes if no box may be empty, is (A) 306 (B) 243 (C) 171 (D) 153

Tardigrade Admin · Accepted Answer

Using beggar 18 C 2=(18 ⋅ 17/2)=153.

Q. Number of ways in which 19 indistinguishable books be packaged into 3 numbered boxes if no box may be empty, is