Ramesh goes to a Kirana store and buys 3 kg of sugar and 2 kg of rice. If the cost vector is represented as a column matrix C = [[40], [60]] and quantity as a row matrix Q = [3, 2], the total cost in ₹ is:

Ramesh goes to a Kirana store and buys 3 kg of sugar and 2 kg of rice. If the cost vector is represented as a column matrix C = [[40], [60]] and quantity as a row matrix Q = [3, 2], the total cost in ₹ is:

• A. [[240]]
• B. [[180]]
• C. [[120]]
• D. [[360]]

Answer: A) [[240]]

Explanation: Total cost = QC = [3, 2] × [[40], [60]] = [3×40 + 2×60] = [120 + 120] = [240]. Thus, he pays ₹240.