class interval 10-25 25-40 40-55 55-70 70-85 85-100 f= 3 2 6 7 5 4 find mean
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Mina Kol to formula Sigma FIR by Sigma f y equal to equal to 62
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class interval 10-25 25 ۔40 40 55 55 70 70 85 85 100آ6 f=3 2 6 7
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