[" pive of two samples of sizes "200" an...

[" pive of two samples of sizes "200" and "],[300" were found to be "25,10" respectively."],[" peir standard deviations were "3" and "4],[" pespectively.The variance of combined "],[" anple of size "500" is "],[[" (a) "64," 2) "65.2]]

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The mean of two samples of sizes 200 and 300 were found to be 25, 10 respectively. Their standard deviations were 3 and 4 respectively. The variance of combined sample of size 500 is

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[" pive of two samples of sizes "200" and "],[300" were found to be "25,10" respectively."],[" peir standard deviations were "3" and "4],[" pespectively.The variance of combined "],[" anple of size "500" is "],[[" (a) "64," 2) "65.2]]

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