In 2012, a survey of household expenditure chose X and Y to make up the basket of goods used for a price index. The index had a value of 100 in 2012. By 2013, its value had risen to 116. Over 2013, the prices of X and Y rose by 10% and 20%, respectively. What percentage weights were assigned to X and Y when the index was calculated?
- Agood X: 25%; good Y: 75%
- Bgood X: 40%; good Y: 60%
- Cgood X: 50%; good Y: 50%
- Dgood X: 70%; good Y: 30%