Question

$\sf {Find\:the\;mean\:of\:the\:Given\:data\:using\: step-deviation-method.}$

$\boxed{\begin{array}{c|c|c|c|c|c|c|c}\bf {Class\:interval:-} &\sf 10-10 &\sf 20-29 &\sf 30-39 &\sf 40-49 &\sf 50-59 &\sf 60-69 &\sf 70-79 \\&&&&&&&\\ \bf {Frequency:-} &\sf 5 &\sf 65 &\sf 222 &\sf 112 &\sf 53 &\sf 40 &\sf 3 \end {array}}$

$\bf Note:-$

Construct a frequency table for your answer.

Spammed answers will be deleted.

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Answer 1

There may be some problem in attachment 2 calculations.

${ \huge\rm \pink {♡H}\rm \blue {A} \rm \purple {N}\ \rm \green{J} \rm\red {U}\ \rm \orange {H} \rm{U} \rm \gray{I♡}}$