An investor can sell her MicroTron stock for 36$ per share and her Dynaco stock for 56$ per share, If she sells 300 shares altogether, some of each stock, at an average price per share of 40$, how many shares of Dynaco stock has she sold? Choose the correct choice from the following choices:
A) 52
B) 75
C) 60
D) 136
E) 184
w1/w2 = (A2 - Aavg)/(Aavg - A1) = (56 - 40)/(40 - 36) = 16/4= 
<gadget id="calculator">16/4</gadget>
<output>4</output>
4/1= Number of MicroTron stocks/Number of Dynaco stocks   So for every 4 MicroTron stock, she sold 1 Dynaco stock.   So out of 300 total stocks, (1/5)th i.e. 300/5 = 60 must be Dynaco stock.   Answer (60)
<result>C</result>
An investor can sell her MicroTron stock for 36$ per share and her Dynaco stock for 56$ per share, If she sells 300 shares altogether, some of each stock, at an average price per share of 40$, how many shares of Dynaco stock has she sold?