πŸ“’ Too many exams? Don’t know which one suits you best? Book Your Free Expert πŸ‘‰ call Now!

  • google app store apple app store
  • βœ–

      Question

      Average weight of 50 boxes is 22 kg. Two more boxes of weights (z + 7) and (z - 5) are added and the average becomes 22.5 kg. Find (z - 18).

      A 12 Correct Answer Incorrect Answer
      B 16 Correct Answer Incorrect Answer
      C 14 Correct Answer Incorrect Answer
      D 18 Correct Answer Incorrect Answer

      Solution

      52 Γ— 22.5 βˆ’ 50 Γ— 22 = z + 7 + z βˆ’ 5
      2z + 2 = 1170 βˆ’ 1100 = 70
      2z = 68
      z = 34
      z βˆ’ 18 = 34 – 18 = 16

      Practice Next
      More Average Questions
      ask-question