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Question Number 32093 by NECx last updated on 19/Mar/18
$${Find}\:{the}\:{number}\:{of}\:{ways}\:{of} \\ $$$${selecting}\:\mathrm{9}\:{balls}\:{from}\:\mathrm{6}\:{red}\:{balls}, \\ $$$$\mathrm{5}\:{white}\:{balls}\:{and}\:\mathrm{5}\:{blue}\:{balls}\:{if} \\ $$$${each}\:{selection}\:{consists}\:{of}\:\mathrm{3}\:{balls} \\ $$$${of}\:{each}\:{colour}. \\ $$
Answered by Joel578 last updated on 19/Mar/18
$$\:_{\mathrm{6}} {C}_{\mathrm{3}} \:.\:_{\mathrm{5}} {C}_{\mathrm{3}} \:.\:_{\mathrm{5}} {C}_{\mathrm{3}} \\ $$
Commented by NECx last updated on 20/Mar/18
$${yeah}.{Thanks} \\ $$