Doubts
Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents
Sign in to save progress →
Doubts
Sign in

Statistics question

2025 · 23 Jan · Shift 1 · Q37
Guest · try one question or challengeGuest · try one question or challenge
  1. PYQ Library
  2. /JEE Main
  3. /Mathematics
  4. /Statistics
  5. /2025 · 23 Jan · Shift 1 · Q37

Statistics question

2025 · 23 Jan · Shift 1 · Q37

JEE MainMathematicsStatisticsMCQ+4 / −1
Marks obtains by all the students of class 12 are presented in a freqency distribution with classes of equal width. Let the median of this grouped data be 14 with median class interval 12-18 and median class frequency 12. If the number of students whose marks are less than 12 is 18 , then the total number of students is :
  1. A
    52
  2. B
    44
  3. C
    40
  4. D
    48
PreviousNext

More from Statistics

  • The variance of the numbers 8,21,34,47,…,320 is ​.2025 · Numerical
  • For a statistical data x1​,x2​,…,x10​ of 10 values, a student obtained the mean as 5.5 and ∑i=110​xi2​=371. He later found that he had noted two values in the data incorrectly as 4 and 5 ,…2025 · MCQ
  • Let x1​,x2​,...,x10​ be ten observations such that i=1∑10​(xi​−2)=30, i=1∑10​(xi​−β)2=98, β>2, and their variance is 54​. If μ and σ2 are respectively…2025 · MCQ
  • Let the median and the mean deviation about the median of 7 observation 170,125,230,190,210, a, b be 170 and 7205​ respectively. Then the mean deviation about the mean of these 7 observations is :2024 · MCQ
  • Consider 10 observations x1​,x2​,…,x10​ such that i=1∑10​(xi​−α)=2 and i=1∑10​(xi​−β)2=40, where α,β are positive integers. Let the mean and the…2024 · MCQ
  • Let α,β∈R. Let the mean and the variance of 6 observations −3,4,7,−6,α,β be 2 and 23, respectively. The mean deviation about the mean of these 6 observations is :2024 · MCQ
  • Let the mean and the standard deviation of the probability distribution be μ and σ, respectively. If σ−μ=2, then σ+μ is equal to ​. Includes table2024 · Numerical
  • The mean and standard deviation of 20 observations are found to be 10 and 2 , respectively. On rechecking, it was found that an observation by mistake was taken 8 instead of 12. The correct standard deviation is2024 · MCQ