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

Statistics question

2022 · 27 Jun · Shift 2 · Q33
Guest · try one question or challengeGuest · try one question or challenge
  1. PYQ Library
  2. /JEE Main
  3. /Mathematics
  4. /Statistics
  5. /2022 · 27 Jun · Shift 2 · Q33

Statistics question

2022 · 27 Jun · Shift 2 · Q33

JEE MainMathematicsStatisticsMCQ+4 / −1
The mean and variance of the data 4, 5, 6, 6, 7, 8, x, y, where x < y, are 6 and 94{9 \over 4}49​ respectively. Then x4+y2{x^4} + {y^2}x4+y2 is equal to :
  1. A
    162
  2. B
    320
  3. C
    674
  4. D
    420
PreviousNext

More from Statistics

  • Let x1​,x2​,x3​,…,x20​ be in geometric progression with x1​=3 and the common ratio 21​. A new data is constructed replacing each xi​ by (xi​−i)2. If xˉ is the mean of new…2022 · Numerical
  • The mean and standard deviation of 15 observations are found to be 8 and 3 respectively. On rechecking it was found that, in the observations, 20 was misread as 5. Then, the correct variance is equal to ​.2022 · Numerical
  • 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…2022 · Numerical
  • Let the mean and the variance of 20 observations x1​,x2​,…,x20​ be 15 and 9 , respectively. For α∈R, if the mean of (x1​+α)2,(x2​+α)2,…,(x20​+α)2…2022 · Numerical
  • Let the mean and the variance of 5 observations x1, x2, x3, x4, x5 be 524​ and 25194​ respectively. If the mean and variance of the first 4 observation are 27​ and a respectively, then (4a + x5) is equal to:2022 · MCQ
  • The number of values of a ∈ N such that the variance of 3, 7, 12, a, 43 − a is a natural number is :2022 · MCQ
  • Consider three observations a, b, and c such that b = a + c. If the standard deviation of a + 2, b + 2, c + 2 is d, then which of the following is true?2021 · MCQ
  • Consider the statistics of two sets of observations as follows : If the variance of the combined set of these two observations is 917​, then the value of n is equal to ​. Includes table2021 · Numerical