- let u = { -2,-1,0,1,3,3,4,5,6,7,8,9,10}, A= {-2,2,3,4,5} and B= {1,3,5,8,8}. verify using de morgan's laws of complementation
if s= {a,b,c,d} where a={ }, b={a,b}, c={a,c} and d={a,b,c}. show that u is a binary operation on s but n is not
In how many ways 5 boys and 5 girls may be arranged around a table so that no two girls sit together?