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Given the following frequency distribution Class frequency 0-10 10-20 20-30/30-40 40-50 50-60 60-70 8 10 12 7 4 F # Find the value of

Given the following frequency distribution Class frequency 0-10 10-20 20-30/30-40 40-50 50-60 60-70 8 10 12 7 4 F # Find the value of "F" required to adjust the mean to "31

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