The mean area of 7 halls is 55 m^2. If the mean area of 6 of them be 58 m^2, find the area of the seventh hall.
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Mean area of 7 halls =55 m^2
:.Total area of 7 halls = 55 × 7 = 385 m^2 and area of 6 halls at of thet= 58 m^2
:. Total area = 58 × 6 = 348 m^2
:. Area of 7th hall = 385 - 348 = 37 m^2
Hope it helps
:.Total area of 7 halls = 55 × 7 = 385 m^2 and area of 6 halls at of thet= 58 m^2
:. Total area = 58 × 6 = 348 m^2
:. Area of 7th hall = 385 - 348 = 37 m^2
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