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Learn in your speed, with individual attention - Teachoo Maths 1-on-1 Class


Transcript

Ex 13.1, 6 The table below shows the daily expenditure on food of 25 households in a locality. Find the mean daily expenditure on food by a suitable method. Mean(𝑥 ̅) = a + h × (∑▒𝒇𝒊𝒖𝒊)/(∑▒𝒇𝒊) Where a = Assumed mean h = Class interval Also, ∑▒𝒇𝒊 = 25 ∑▒𝒇𝒊𝒖𝒊 = −7 Putting values in formula Mean(𝒙 ̅) = a + h × (∑▒𝒇𝒊𝒖𝒊)/(∑▒𝒇𝒊) 𝑥 ̅ = 225 + 50 × (−7)/25 𝑥 ̅ = 225 − 14 𝒙 ̅ = 211 Thus, Mean Daily expenditure on food is Rs 211

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Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.