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     EduGorilla 
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    The average height of 30 girls in a class of 40 is 160 cm and that of the remaining girls is 156 cm. The average height of the whole class is

    Options :-

    1. 157 cm
    2. 158 cm
    3. 154.5 cm
    4. 159 cm
    5. 150 cm
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