10 6. Find out standard deviation from the followinng table ?
Class Intervals and Frequencies 55-59 1 50-54 1 45-49 3 40-44 4 35-39 6 30-34 7 25-29 12 20-24 6 15-19 8 10-14 2 N = 50
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which of the following is correct 2000 +75 =20 +75 B 200+75= 250 + 75 c 200 + 75 = 205 + 70
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