Ononot — In a study using ratio estimation, if \bar{y} = 20, \bar{x}

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In a study using ratio estimation, if $\bar{y} = 20$ , $\bar{x} = 10$ , and the population mean of the auxiliary variable is $\bar{X} = 50$ , what is the estimated population total $\hat{Y}_R$ if $N=1000$ ?