Question
The number of ways, in which 16 oranges can be distributed to four children such that each child gets at least one orange, is
The number of ways, in which 16 oranges can be distributed to four children such that each child gets at least one orange, is
A. 455
Distributing 16 identical oranges to 4 children with each getting at least 1. Let x_i 1 for i = 1,2,3,4 and x_1+x_2+x_3+x_4 = 16. Substituting y_i = x_i - 1 0: y_1+y_2+y_3+y_4 = 12. By stars and bars, number of ways = 12+3 3 = 15 3 = 15 14 13 6 = 455.
Related: Mathematics — Permutation Combination · All PYQ Banks