21. The mean and median of 7, 5, 5, 2, 7, 6, 5, 3, 7,6 RRB NTPC (Phase I) 2016 (1) 5.3 and 5 (2) 5 and 6 (3) 5 and 5.5 (4) 5.3 and 5.5

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7,5,5,2,7,6,5,3,7,6 [ operatorname{mean}=frac{7+5+5+2+7+6+5+3+7+6}{10} ] ( operatorname{mean}=frac{53}{10}=5 cdot 3 ) For median arrange in ascending order. ( 2,3,5,5, frac{sqrt{5}, 6}{v}, 6,7,7,7 ) average Median ( =5 cdot 5 ) レ (4) ( 5 cdot 3 ) and ( 5 cdot 5 )

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