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


Transcript

Ex 13.3, 5 Find the following table gives the distribution of the life time of 400 neon lamps: Find the median life time of a lamp. Finding Median Median = l + (𝑁/2 −𝑐𝑓)/𝑓 × h Here, 𝑵/𝟐 ∴ 3000 – 3500 is median class And, l = h = cf = f = Putting values in formula Median = l + (𝑁/2 −𝑐𝑓)/𝑓 × h = 3000 + (𝟐𝟎𝟎 −𝟏𝟑𝟎)/𝟖𝟔 × 500 = 3000 + 70/86 × 500 = 3000 + 406.98 = 3406.98 So, median life of lamp is 3406.98 hours

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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.