KASNEB CPA Foundation Level (Kenya) · Business Mathematics and Statistics

Weighted means, trends and demand lines

10 practice questions, each with the answer and an explanation.

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All 10 questions

  1. Three courses have average marks of 70, 80 and 90, with credit weights 2, 3 and 5. What is the weighted mean mark?
  2. Three courses have average marks of 60, 75 and 85, with credit weights 1, 2 and 2. What is the weighted mean mark?
  3. Three courses have average marks of 50, 65 and 90, with credit weights 4, 3 and 3. What is the weighted mean mark?
  4. Three courses have average marks of 40, 55 and 70, with credit weights 1, 1 and 2. What is the weighted mean mark?
  5. Monthly sales (in thousands) for six months are 12, 15, 18, 21, 24, 27. What is the first three-month moving average?
  6. Monthly sales (in thousands) for six months are 30, 38, 32, 41, 35, 47. What is the first three-month moving average?
  7. Monthly sales (in thousands) for six months are 100, 112, 109, 121, 118, 130. What is the first three-month moving average?
  8. A linear demand curve passes through the points (price 10, quantity 100) and (price 20, quantity 80). What quantity is demanded at a price of 30?
  9. A linear demand curve passes through the points (price 5, quantity 200) and (price 15, quantity 150). What quantity is demanded at a price of 25?
  10. A linear demand curve passes through the points (price 8, quantity 90) and (price 14, quantity 60). What quantity is demanded at a price of 23?

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