The mode of the following data is 67. Find the missing frequency x.
Last updated at Oct. 27, 2020 by Teachoo
Transcript
Question 33 The mode of the following data is 67. Find the missing frequency x.Given Mode = 67 โด Modal class is 60 โ 70 Mode = l + (๐๐ โ๐๐)/(๐๐๐ โ ๐๐ โ ๐๐) ร h where l = lower limit of modal class h = class-interval f1 = frequency of the modal class f0 = frequency of the class before modal class f2 = frequency of the class after modal class Now, Mode = l + (๐๐ โ๐๐)/(๐๐๐ โ ๐๐ โ ๐๐) ร h 67 = 60 + (15 โ ๐ฅ)/(2(15) โ ๐ฅ โ 12) ร 10 67 โ 60 = (15 โ ๐ฅ)/(30 โ ๐ฅ โ 12) ร 10 7 = (15 โ ๐ฅ)/(18 โ ๐ฅ) ร 10 7(18 โ x) = (15 โ x) ร 10 126 โ 7x = 150 โ 10x 10x โ 7x = 150 โ 126 3x = 24 x = ๐๐/๐ = 8
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CBSE Class 10 Sample Paper for 2021 Boards - Maths Standard
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