Dear Student,
As Price of 100 shares is 2000 rs
so, Price of 1 share = 2000/100 = 20rs which is market value.
So, Market Value of One Share = 20 Rs
And Given that,
Face value of One Share = 10 Rs
so,
Premium on One Share
=Market Value of One Share - Face Value of One Share
=20-10
=10 rs
So, Premium on 100 Share = 10*100=1000 Rs
Regards