Aliyah Earned Bonus of $ 6000Â
30% of $ 6000 = $ 1800Â
Therefore remaining amount after paying tax = $ (6000 - 1800)Â
 = $ 4200
 Hence, She invested total amount of $ 4200 in two stocks say, x and y
 let x - stock that returned 10 % after 1 year
 and y - stock that returned 4 % after 1 year
 x + y = 4200 equation 1
Â
 &, (x * 1 * 10)/(100) = 0.1 x
 , (y*1*4)/(100)= 0.04 y
 Now, from given conditions,Â
 0.1 x + 0.04 y = 240 equation 2Â
 by solving equation 1 and 2 simultaneously we get x and y as,
 x = $ 1200 and
 y = $ 3000