Question 991442
Look at all possible outcomes. 
There are 30 of them{{{6!/(6-2)!}}}. 
30,40
30,50
30,60----->90
30,130
30,140
40,30
40,50----->90
40,60
40,130
40,140----->180
50,30
50,40----->90
50,60
50,130----->180
50,140
60,30----->90
60,40
60,50
60,130
60,140
130,30
130,40
130,50----->180
130,60
130,140
140,30
140,40----->180
140,50
140,60
140,130
So of the 30, 8 of them are either supplementary or complementary.
{{{P=8/30=4/15}}}