9

Part of 2005 Postal Coaching

Problems(1)

Distribution of balls

Source: Indian Postal Coaching 2005

In how many ways can

n

identical balls be distributed to nine persons

A,B,C,D,E,F,G,H,I

so that the number of balls recieved by

A

is the same as the total number of balls recieved by

B,C,D,E

functioncombinatorics unsolvedcombinatorics