Hai , this is a DS Q

1.)is |M-N|=|M|-|N|?

1.) M>N
2.) M+N>1

Pls help me out ;
it have opted B
Am i right or wrong?

2.) In a class there 11 students , their average wt has given as 44, if the least weight of 6 member weigh 44, Highest weights of 6 memebers weight 55 , what is the median of the 11 members.
a.) 40
b.) 44
c.) 50
d.) 50.5