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The average temperature of first three days in a week is 25°C and that of the next three days is 29°C. If the average temperature of the whole week is 28.5°C, what is the temperature of the last day of the week?1). 35.5°C2). 39.50°C3). 29°C4). 37.50°C |
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Answer» Average of a QUANTITY = SUM of quantities/Total NUMBER of quantities The average temperature of first THREE days in a week is 25°C Sum of temperatures of first three days = 25° × 3 = 75°C The average temperature of the next three days is 29°C Sum of temperature of the next three days = 29° × 3 = 87°C The average temperature of the whole week is 28.5°C Sum of temperature of the whole week is = 28.5° × 7 =199.5°C The temperature of the last day of the week = Sum of temperatures of the whole week – Sum of temperatures of first three days – Sum of temperatures of the next three days = 199.5°C – 75°C – 87°C = 37.5°C |
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