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      Question

      The first six days of a week had an average rainfall of 90

      cm, while the last six days recorded an average of 98 cm. If the weekly average rainfall was 95 cm, find the rainfall on the sixth day.
      A 354 cm Correct Answer Incorrect Answer
      B 375 cm Correct Answer Incorrect Answer
      C 463 cm Correct Answer Incorrect Answer
      D 371 cm Correct Answer Incorrect Answer

      Solution

      ATQ,

      Total rainfall for the first six days = 90 × 6 = 540 cm

      Total rainfall for the last six days = 98 × 6 = 588 cm

      Total rainfall for the whole week = 95 × 7 = 665 cm

      Rainfall on the sixth day = {(540 + 588) – 665} = 463 cm

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