Priya invests ₹1000 in shares of company A and ₹2000 in company B. The annual return percentages are represented by the column matrix [[8], [10]]. What is her total annual return in ₹?

Priya invests ₹1000 in shares of company A and ₹2000 in company B. The annual return percentages are represented by the column matrix [[8], [10]]. What is her total annual return in ₹?

• A. [[280]]
• B. [[18000]]
• C. [[28000]]
• D. [[28]]

Answer: A) [[280]]

Explanation: Investment matrix = [1000, 2000]. Return rate matrix = [[8/100], [10/100]] = [[0.08], [0.10]]. Total return = 1000×0.08 + 2000×0.10 = 80 + 200 = ₹280.