dear zubair,
you should opt applied maths,as being among the most scoring subjects in 2010-11.as muhammad aafzal secured 174 marks n ayesha mehmood as the topper in math snatched 190 marks.
i myself m the student of Mechanical engineering student hav optd A.math, the portions differential equations n numerical analysis are usually studied in mecanical engg; and the portion of statics n dynamics u might hav studied in mechanics as per formal course. only the portion of tensor analysis u urself hav to study n should hav to grip over it.
only the thing to make the maths as highr scoring subject is to practice more n more, as much possible u can.
wish u best of luck