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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

Posted by Palavalasa Harsha Vardhan 2 years, 11 months ago

CBSE > Class 10 > Mathematics

1 answers

Preeti Dabral 2 years, 11 months ago

Marks	No. of students fi	xi	fixi
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		Σfixi=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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