The hight of students in a team are 135cm, 122cm,
143cm, 130cm and 125cm.
a)What is the average hight of a student in the team
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Answer:
Correct option is
D
115 cm
Total height of 10 students =10×105=1050cm
Total height of 20 students =20×120=2400cm
∴ total height of 30 students =1050+2400=3450
Hence average height of 30 students =
30
3450
=115cm
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