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the mean of 21 number is …

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the mean of 21 number is 15 each number is multiplied by 2 then what will be the new mean.

    • Posted by Sanjavi Kumari 8 years, 5 months ago

    CBSE > Class 09 > Mathematics
    • 1 answers

    Rachit Dwivedi 8 years, 5 months ago

    X/15=21 So X=315 Twice the sum X=630 New mean 630/15=42 By -Rachit Subodh Dwivedi?

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