The average height of 30 boys out of a class of 50 is 160 cm. If the average hei

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The average height of 30 boys out of a class of 50 is 160 cm. If the average height of the remaining boys is 165 cm, the average height of the whole class (in cm) is :

Options:

A . 161

B . 162

C . 163

D . 164

Answer: Option B

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