Use app×
Join Bloom Tuition
One on One Online Tuition
JEE MAIN 2025 Foundation Course
NEET 2025 Foundation Course
CLASS 12 FOUNDATION COURSE
CLASS 10 FOUNDATION COURSE
CLASS 9 FOUNDATION COURSE
CLASS 8 FOUNDATION COURSE
+1 vote
48.0k views
in Mathematics by (54.8k points)

Let the observations xi(1 ≤ i ≤ 10) satisfy the equations, ∑(xi - 5) for i[i=1, 10] = 10 and ∑(xi - 5)2 for i[i=1, 10] = 40. If μ and λ are the mean and the variance of the observations, x1 - 3, x2 - 3, x10 - 3, then the ordered pair (μ, λ) is equal tp:

(1) (6, 6)

(2) (3, 6)

(3) (6, 3)

(4) (3, 3)

2 Answers

+1 vote
by (52.5k points)
selected by
 
Best answer

Answer is (4) (3, 3)

+2 votes
by (58.3k points)

Answer is (4) (3, 3)

by (10 points)
Where did the +90 in the last equation come from?

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

...