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The mean of the n observation x1, x2, x3...

The mean of the `n` observation `x_1, x_2, x_3, ,x_n` be ` x dot` Then the mean of `n` observations `2x_1+3,2x_2+3,2x_3+3,2x_n+3` is...... a. `3 x +2` b. `2 x +3` c. ` x +3` d. `2 x `

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