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Questions  >>  JEEMAIN and NEET  >>  Mathematics  >>  Class11  >>  Statistics
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Q)

Combined mean of two series $x_1\: and \: x_2$ when \[\] $x_1 = 210,\: x_2 = 150, \: n_1=50, \: n_2=100 $ is

$\begin {array} {1 1} (A)\;150 & \quad (B)\;160 \\ (C)\;170 & \quad (D)\;180 \end {array}$

 

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