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Olympiad-Math
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Class 6
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Math
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Analytical Reasoning
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Q)
There are 20 students with an average height of 105 cms in a class. Then 10 students with an average height of 120 cms join the class. What will be the average height of the class now?
( A ) 100
( B ) 130
( C ) 120
( D ) 110
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