Will the judge of all the earth not do justice?

Abraham asks for 50 to save Sodom and the periphery.
45.
40.
30.
20.
10.
It doesn’t go. Abraham falls silent. God goes and the decree is carried out.
 
But the argument that it would be as righteous as it was wicked, to kill a righteous man with a wicked man, was not resolved.
If there are 2 righteous people in Sodom or 1, why will they be killed?
In the Bible, perhaps the Korah means that it is okay if fewer than 10 righteous people die?