Three people invest in a business. The first two invest in theratio 2:3, and the third person invest twice as much as the other two combines. The total invested is 30 million. How much did the major investor contribute?

The ratios of the 3 investors is: 2 : 3 : 10

Sum of the ratios =2 + 3 + 10 = 15

[2 / 15] x $30,000,000 = $4,000,000 share of the smallest investor

[3 / 15] x $30,000,000 = $6,000,000 share of the 2nd investor

[10 / 15] x $30,000,000 =$20,000,000 share of the biggest investor.