3g of dextro and 2g of levo sugar are taken specific rotation =+50 Calculate the optical rotation of the sample

$ee=major-$minor

Dextro rotation  $\frac{3g}{5g}\times 100$

$\frac{3}{5}\times 100{=}_{+}60$

Levo rotation = $\frac{2}{5}\times 100=40$

$ee=major-$minor

=60 - 40

=20

$ee=\frac{opticalrotation}{Specficrotation}\times 100$

$20=\frac{opticalrotation}{50}\times 100$

Optical rotation $=\frac{50\times 20}{100}$ 

Optical rotation=10