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17-07-2018
Mathematics

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The average height of a class of 18 students is 105 cm After arrival of 7 new students the
average decrees by 5 cm. Find sum of height of all the students of the class.

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Аноним Аноним

17-07-2018

Total number of students = 18 + 7 = 25

Average height of the 25 students = 105 - 5 = 100 cm

Sum of height of all students = 100 x 25 = 2500cm

Answer: 2500cm

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