Sri and Godfrey are marooned on a desert island.
Together, they have a toothbrush, a calculator, a volleyball, an mp3 player, a kite, and a shovel.
They decide to distribute these objects randomly among themselves. However, they agree that each person should get at least one object.
How many ways can the objects be distributed among Sri and Godfrey?
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Relevant wiki: Distinct Objects into Distinct Bins
There are 6 distinct objects being distributed into 2 distinct bins. The number of distributions of this type is 2 6 = 6 4 .
However, it is specified that each person will receive at least one object.
There is 1 distribution in which Sri gets all the objects. Likewise there is 1 distribution in which Godfrey gets all the objects. Therefore, the number of distributions in which each person gets at least one object is 6 4 − 1 − 1 = 6 2 .