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JAMB Mathematics 1987 Question 18

Question 18

Algebraic Expressions

The formula Q = 1.5 + 0.5n, gives the cost Q (in naira) of feeding n people for a week. Find in kobo the extra cost of feeding one additional person.

  1. A.350k
  2. B.200k
  3. C.150k
  4. D.50k
Show the answer and explanation

Answer: D (50k)

Explanation

Increasing n by 1 increases Q by 0.5 naira, the coefficient of n. That is 50 kobo.