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up vote 0 down vote favorite I'm using Ubuntu 13.10 with GNOME Desktop. I'm looking for a way to add a Printers shortcut to the Desktop panel, because I always need to change printer settings. How can I do this? 13.04 printing gnome-control-center share | improve this question edited Nov 29 at 10:17 Zanna 49.3k 13 126 236 asked Feb 6 '14 at 3:47 Deniz 79 2 6 19 ...

up vote 0 down vote favorite Find the number of five-card hands dealt from a deck of $52$ cards, s.t. there is one pair (two cards of one denomination), a third card of a different denomination, a fourth card of a third different denomination, and a fifth card of a fourth different denomination. My approach is: There is application of product principle for all the sub-cases (& in the sub-cases as well). (i) There are $binom{13}{1}$ ways to get one denomination, then choose two cards out of four suits by $binom{4}{2}$ . (ii) Further, the third card can be chosen in $binom{12}{1}$ ways, with a particular card chosen in $binom{4}{1}$ ways. (iii) The fourth card can be chosen in $binom{11}{1}$ ways, with a particular card chosen in $binom{4}{1}$ ways. (iv) Further, the fifth card can be chosen in $binom{10}{1}$ w...