Search for: The AM of n observations is M. If the sum of (n – 4) observations is a ,then the mean of remaining four observations is The AM of n observations is M. If the sum of (n - 4) observations is a ,then the mean of remaining four observations is AnM−a4BnM+a2CnM−a2DnM+a Register to Get Free Mock Test and Study Material +91 Verify OTP Code (required) I agree to the terms and conditions and privacy policy. Solution:Let x1,x2,…,xn be n observations.∴ M=x1+x2+x3+…+xnn =x1+x2+…+xn−4+xn−3+xn−2+xn−1+xn⇒nM=a+xn−3+xn−2+xn−1+xn⇒ nM−a4=xn−3+xn−2+xn−1+xn4Post navigationPrevious: Let f:[0,∞)→R be a continuous strictly increasing function, such that f3(x)=∫0x t⋅f2(t)dt for every x≥0 Then value of f(6) is ___.Next: The average marks of boys in a class is 52 and that of girls is 42. The average marks of boys and girls combined is 50. The percentage of boys, in the class isRelated content JEE Main 2023 Question Papers with Solutions JEE Main 2024 Syllabus Best Books for JEE Main 2024 JEE Advanced 2024: Exam date, Syllabus, Eligibility Criteria JEE Main 2024: Exam dates, Syllabus, Eligibility Criteria JEE 2024: Exam Date, Syllabus, Eligibility Criteria NCERT Solutions For Class 6 Maths Data Handling Exercise 9.3 JEE Crash Course – JEE Crash Course 2023 NEET Crash Course – NEET Crash Course 2023 JEE Advanced Crash Course – JEE Advanced Crash Course 2023