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Question

The Geometric mean of four numbers 2, X, 16, 32 is 8. What is the value of X ?

The correct answer is
4

Geometric Mean Calculation for X

The geometric mean (GM) of a set of $n$ numbers is the $n$-th root of the product of the numbers. The formula is:

$ GM = \sqrt[n]{a_1 \times a_2 \times ... \times a_n} $

In this problem, we have four numbers: 2, X, 16, and 32. The geometric mean is given as 8.

Solving for X

  1. Set up the geometric mean equation using the given values:

    $ 8 = \sqrt[4]{2 \times X \times 16 \times 32} $

  2. To eliminate the fourth root, raise both sides of the equation to the power of 4:

    $ 8^4 = 2 \times X \times 16 \times 32 $

  3. Calculate the values:
    • $8^4 = 4096$
    • $2 \times 16 \times 32 = 32 \times 32 = 1024$
    The equation becomes:

    $ 4096 = X \times 1024 $

  4. Solve for X by dividing both sides by 1024:

    $ X = \frac{4096}{1024} $

    $ X = 4 $

Therefore, the value of X is 4.

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Important Questions from Measures of Central Tendency

  1. What is the median of the following data?


    24, 30, 40, 80, 15, 57, 78, 82, 39, 97, 82

  2. In order to conduct exploratory data analysis, which of following are used by a researcher in the five number summary?

    A. Median

    B. First quartile

    C. Mean

    D. Third quartile

    E. Smallest and largest values

    Choose the correct answer from the options given below:
  3. If mean = 28 and mode = 25, the value of median will be :
  4. Given arithmetic mean = 45, mode = 48, then median =
  5. Assertion (A) : Geometric mean is theoretically considered as the best average to construct index numbers.
    Reason (R) : Geometric mean is used if the range of observations is extremely large.
    Codes :
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