JEE Main · Quantitative Aptitude

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The first of the two samples in a group has 100 items with mean 15 and standard deviation 3. If the whole group has 250 items with mean 15.6 and standard deviation

\sqrt{13.44}

, then the standard deviation of the second sample is:

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JEE Main Sample Standard practice

What visitors can use on this page

JEE Main Sample Standard practice FAQ

Prepare together, not alone

JEE Main Sample Standard practice

What visitors can use on this page

JEE Main Sample Standard practice FAQ