A & B have, between them, Rs. 1200. A spends 12% of his money while B spends 20% of his money. They are then left with a sum that constitutes 85% of the whole sum. Find what amount is left with A.
Rs 750
Rs 800
Rs 700
Rs 660
A=x B=1200-x
$85 \%$ of $x+80 \%$ of $(1200-x)=85 \%$ of 1200
$X=750$
Amount left with $A=88 \%$ of $750=660$
Option D