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Discussion

  1. The average temperature of the first three days of the week is 25° C and that of the next three days is 27° C If the average ofthe whole week is 26.5° C, then the temperature of the last week of the week is
    1. 31.5° C
    2. 29.5° C
    3. 21° C
    4. 27.5° C
  1. Correct Option: B

    Let the temperature on the last day of the week be x° C

    Average of the week = ( 3 x 25 + 3 x 27 + x ) / 7 = 26.5
    ⇒ 3 x 25 + 3 x 27 + x = 7 x 26.5
    ⇒ 156+ x = 185.5
    ∴ x = 29.5
    So, the temprature on the last day of the week is 29.5° C

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