Learn

Friday, 9 October

JEE Main Maths · Statistics

Effect of Linear Transformations

Effect of Linear Transformations (Statistics) was asked 2 times in 2 JEE Main shifts, 2020, out of the 42 shifts Lumi analysed.

Times asked
2
in 2 shifts
Years
2020
Usual format
Single correct
Application
Pattern
Gone quiet
repeats across shifts

How it is asked

  • Find unknown data from mean and variance
  • Effect of linear transformation on mean and sd

Difficulty

Easy 0Medium 2Hard 0

Where it sits

Chapter: Statistics. Topic: Variance and SD, 27 questions over 10 ideas.

Other repeat ideas in this topic

Every time it came

All 2 questions

Newest first, each with its options and official answer.

  1. 8 Jan 2020, Shift 1 · Q67The mean and the standard deviation (s.d.) of 10 observations are 20 and 2 respectively. Each of these 10 observations is multiplied by p…MediumSingle correct
  2. 2 Sep 2020, Shift 1 · Q67Let X={x∈N:1≤x≤17}X=\{x\in\mathbf{N} : 1\le x\le 17\} and Y={ax+b:x∈XY=\{ax+b : x\in X and a,b∈R,a>0}a, b\in\mathbf{R}, a>0\}. If mean and variance of elements of Y…MediumSingle correct