Huang bought two kinds of stocks  Last year, the average value of all the stocks increased by 7 yuan per share, among which the average value of M company's shares increased by 10 yuan per share, and the average value of N company's shares increased by 6 yuan per share
Huang bought more shares of Company N
 Huang believes that the difference in value added may be caused by the fact that the average share price of Company M is higher than that of Company N at the time of purchase, assuming that the share appreciation ratio is: the value added per share divided by the purchase price per share