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Find the mean literacy rate: Literacy …

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Find the mean literacy rate: Literacy rate 45-55,55-65, 65-75, 75-85,85-95 Number of cities 3,10,11,8,3
  • 1 answers

Preeti Dabral 1 year, 4 months ago

Marks No. of students 
fi​
xi​  fi​xi​ 
45-55 3 50 150
55-65 10 60 600
65-75 11 70 770
75-85 8 80 640
85-95 3 90 270
  Σfi​=35    Σfi​xi​=2430 

We know that, arithmetic mean {tex}=\frac{\Sigma \mathrm{f}_{\mathrm{i}} \mathrm{x}_{\mathrm{i}}}{\Sigma \mathrm{f}_{\mathrm{i}}}{/tex}

∴Mean literacy rate{tex}=\frac{2430}{35}=69.43 \%{/tex}

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