Câu 27: NMAT: Narsee Monjee Management Aptitude Test

Four friends — Anthony, Benjamin, Cathy and David — were comparing their monthly incomes. It was found that in March, the ratio of the monthly incomes of Anthony to Benjamin to Cathy to David was 6 : 7 : 8 : 9 and the average income per friend was $7,500. In April, the monthly incomes of Anthony and David increased by 5% and 10%, respectively, but the monthly incomes of Benjamin and Cathy remained unchanged. By what percentage is the combined total income of the four friends in April more than their combined total income in March?

1. A. 1%
2. B. 2%
3. C. 3%
4. D. 4% — đáp án hiện tại
5. E. 5%