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NDA Geometry: Circles — practice questions

Explore 8 free Geometry: Circles questions in NDA Mathematics. Open each question or exercise to read its content, reference answers and available explanation.

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Geometry: Circles questions and exercises with answers

Showing questions 1–8 of 8.

Which of the following is NOT a measure of central tendency?Read the answer and worked solution →The mean of $n$ observations $x_1, x_2, \ldots, x_n$ is:Read the answer and worked solution →Range of a data set is defined as:Read the answer and worked solution →Batsman A scored 30, 91, 0, 64, 42, 80, 30, 5, 117, 71. What is the range of his scores?Read the answer and worked solution →Which of the following is NOT a measure of central tendency?Read the answer and worked solution →The mean of $n$ observations $x_1, x_2, \ldots, x_n$ is:Read the answer and worked solution →Range of a data set is defined as:Read the answer and worked solution →Batsman A scored 30, 91, 0, 64, 42, 80, 30, 5, 117, 71. What is the range of his scores?Read the answer and worked solution →

Worked practice questions

Which of the following is NOT a measure of central tendency?

  1. Standard deviation
  2. Mode
  3. Median
  4. Mean
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Correct answer: A. Standard deviation

Mean, median, and mode are measures of **central tendency**. Standard deviation is a measure of **dispersion**.

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The mean of $n$ observations $x_1, x_2, \ldots, x_n$ is:

  1. $\sqrt{\sum x_i}$
  2. $\sum x_i$
  3. $\dfrac{n}{\sum x_i}$
  4. $\dfrac{1}{n} \sum x_i$
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Correct answer: D. $\dfrac{1}{n} \sum x_i$

Mean $\bar{x} = \dfrac{1}{n} \sum_{i=1}^{n} x_i$.

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Range of a data set is defined as:

  1. Maximum + Minimum
  2. Maximum value − Minimum value
  3. Maximum value × Minimum value
  4. Mean of all values
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Correct answer: B. Maximum value − Minimum value

Range = Max − Min.

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