imo class 12 matrices

A shop sells three types of pens: A, B, C. The sales on Monday and Tuesday are given by matrix S = [[10, 15, 20], [12, 18, 22]] where rows are days and columns are pen types. The price per pen in ₹ is given by column matrix P = [[5], [8], [10]]. The total revenue on Monday i…

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A shop sells three types of pens: A, B, C. The sales on Monday and Tuesday are given by matrix S = [[10, 15, 20], [12, 18, 22]] where rows are days and columns are pen types. The price per pen in ₹ is given by column matrix P = [[5], [8], [10]]. The total revenue on Monday is:

  • A. ₹370
  • B. ₹350
  • C. ₹400
  • D. ₹380

Answer: A) ₹370

Explanation: Revenue on Monday = 10×5 + 15×8 + 20×10 = 50 + 120 + 200 = 370.

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