A ‘less than’ cumulative frequency table for monthly electricity bills (in ₹) of 70…

MATHEMATICS · Multi-part · CBSE · Mathematics · Statistics · Statistics

Problem

A ‘less than’ cumulative frequency table for monthly electricity bills (in ₹) of 70 households is given below:
Bill (₹) less thanCumulative frequency
10007
200019
300037
400056
500070
(a) Determine the frequency of each class ₹0–1000, ₹1000–2000, ₹2000–3000, ₹3000–4000 and ₹4000–5000. (b) Identify the class in which the 70th percentile of the data lies.

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