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[" (a) "11],[" Q "7" If the mean of "6,7...

[" (a) "11],[" Q "7" If the mean of "6,7,x,8,y,14" is "9," then "],[[" (a) "x+y=21," (b) "x+y=19," (c) "x-y=19],[" of "x" be cumer first "20" odd number numbers is "]]

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