MCQMediumJEE Main 2024 · 6 April, Shift 1Measures of Dispersion

Mathematics Question from JEE Main 2024 · 6 April, Shift 1

The mean and standard deviation of 2020 observations are found to be 1010 and 22, respectively. On rechecking, an observation was mistakenly taken as 88 instead of 1212. The correct standard deviation is:

  • A

    3.86\sqrt{3.86}

  • B

    1.81.8

  • C

    3.96\sqrt{3.96}

  • D

    1.941.94

Answer & step-by-step solution

Sign in to reveal the correct answer, the full step-by-step solution, and the common mistakes for this question.

Practice more Measures of Dispersion questions

Get unlimited AI-adaptive practice, mastery tracking, and an AI tutor that explains every step - free to start.

Related questions