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JEEMAIN and NEET
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JEEMAIN PAST PAPERS
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2009
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Q)
If the mean deviation of number $1, 1+d, 1 +2d, . . . ., 1 + 100d$ from their mean is 255, then the $d$ is equal to
( A ) $10.0$
( B ) $20.0$
( C ) $20.2$
( D ) $10.1$
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