The first of the two samples in a group has 100... | Statistics

JEE MAIN 2021

25-07-2021 S2

Question

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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Solution

Question Tags

JEE Main

Mathematics

Medium

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