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JEE Main 2020 · MathsMultiple choiceSingle correctHardConceptual

JEE Main 3 September 2020, Shift 1, Maths Q67

Question 67 of 75 in this shift, Maths question 17 of 25.

For the frequency distribution : Variate (

x

) :

x_1

x_2

x_3

...

x_{15}

Frequency (

f

) :

f_1

f_2

f_3

...

f_{15}

where

0<x_1<x_2<x_3<\ldots<x_{15}=10

and

\sum_{i=1}^{15}f_i>0

, the standard deviation cannot be :

(1) $6$ Official answer
(2) $4$
(3) $2$
(4) $1$

Official answer

Option 1

NTA final key (Sep 2020).

Chapter: Statistics
Topic: Variance and SD
Idea tested: Maximum Variance of Bounded Data

Same idea in other shifts

Asked 2× in all

28 Jun 2022, Shift 2 · Q22Suppose a class has 7 students. The average marks of these students in the mathematics examination is 62, and their variance is 20. A…MediumNumerical value

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.