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Saturday, 31 October

JEE Main 2022 · MathsNumerical answerNumerical valueMediumMulti-step

JEE Main 28 June 2022, Shift 2, Maths Q22

Question 22 of 90 in this shift, Maths question 22 of 30, Section B.

Suppose a class has 7 students. The average marks of these students in the mathematics examination is 62, and their variance is 20. A student fails in the examination if he/she gets less than 50 marks, then in worst case, the number of students can fail is __________.

Official answer

0

NTA final key.

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

Same idea in other shifts

Asked 2× in all
  1. 3 Sep 2020, Shift 1 · Q67For the frequency distribution : Variate (xx) : x1x_1 x2x_2 x3x_3 ... x15x_{15} Frequency (ff) : f1f_1 f2f_2 f3f_3 ... f15f_{15} where…HardSingle correct

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.