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28 August, 10:48

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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  1. 28 August, 11:15
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    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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