Question Number 116173 by I want to learn more last updated on 01/Oct/20
$$\mathrm{How}\:\mathrm{many}\:\mathrm{ways}\:\mathrm{can}\:\mathrm{the}\:\mathrm{letters}\:\mathrm{of}\:\mathrm{the}\:\mathrm{word}\:\:\mathrm{DENKENMATHEMATICAL} \\ $$$$\mathrm{be}\:\mathrm{arranged}\:\mathrm{if}\:\mathrm{no}\:\mathrm{same}\:\mathrm{letters}\:\mathrm{must}\:\mathrm{be}\:\mathrm{together} \\ $$
Commented by mr W last updated on 01/Oct/20
$${very}\:{hard}\:{question}! \\ $$$${see}\:{Q}\mathrm{109387} \\ $$
Commented by I want to learn more last updated on 03/Oct/20
$$\mathrm{Ohh}.\:\mathrm{Thanks}\:\mathrm{sir} \\ $$