Search for: If the mean of the data 7, 8, 9, 7, 8, 7 λ is 8,then the variance of this data is If the mean of the data 7, 8, 9, 7, 8, 7 λ is 8,then the variance of this data is A2B7/8C9/8D1 Fill Out the Form for Expert Academic Guidance!l Grade ---Class 1Class 2Class 3Class 4Class 5Class 6Class 7Class 8Class 9Class 10Class 11Class 12 Target Exam JEENEETCBSE +91 Preferred time slot for the call ---9 am10 am11 am12 pm1 pm2 pm3 pm4 pm5 pm6 pm7 pm8pm9 pm10pm Please indicate your interest Live ClassesBooksTest SeriesSelf Learning Language ---EnglishHindiMarathiTamilTeluguMalayalam Are you a Sri Chaitanya student? NoYes Verify OTP Code (required) I agree to the terms and conditions and privacy policy. Solution:Let the mean of the given observations is x~. ∴x¯=7+8+9+7+8+7+λ+88=8 [∴x¯=8(given)]⇒54+λ=64⇒λ=64−54=10Now Σxi2=(7)2+(8)2+(9)2+(7)2+(8)2+(7)2+(10)2+(8)2=49+64+81+49+64+49+100+64=520Variance, σ2=∑xi2n−(x¯)2=5208−(8)2=65−64=1 Related content Class 9 Science MCQ Chapter 12 Sound CBSE Class 12 English MCQ with Answers (Flamingo & Vistas) CBSE Class 7 Science MCQ Questions with Answers CBSE Class 12 Subject Wise MCQ 2024-25 ICSE Class 10 Toppers List 2024 Available Tenses Worksheet for Class 10 CBSE Class 7 Science Chapter 4 Heat MCQ Questions with Answers Nephron Diagram Class 10 CBSE Class 7 Science Chapter 2 Nutrition in Animals MCQ with Answers Rabindranath Tagore Jayanti 2024