At an election three wards of a tow...

At an election three wards of a town of a are canvassed by by 3,4, and 5 men respectively if 20 men volunteer , in how many can they be alloted to the different wards ?

`""^(20)C_(3)`

`""^(17)C_(4)`

`""^(13)C_(5)`

`""^(20)C_(3).""^(17) C_(4).""^(13 ) C_(5)`

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