Question Number 34738 by chakraborty ankit last updated on 10/May/18
Commented by candre last updated on 10/May/18
$$\left\{\mathrm{1},\mathrm{2},\mathrm{3}\right\} \\ $$$$\left\{\left(\mathrm{1},\mathrm{1}\right),\left(\mathrm{2},\mathrm{2}\right),\left(\mathrm{3},\mathrm{3}\right),\left(\mathrm{1},\mathrm{2}\right),\left(\mathrm{2},\mathrm{1}\right),\left(\mathrm{2},\mathrm{3}\right),\left(\mathrm{3},\mathrm{2}\right),\left(\mathrm{1},\mathrm{3}\right),\left(\mathrm{3},\mathrm{1}\right)\right\} \\ $$$$\left({B}\right)\mathrm{7} \\ $$
Commented by chakraborty ankit last updated on 13/May/18
$${thank}\:{you}\:{sir} \\ $$