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The mean of five number is 27.if one number is excluded their mean is 25 find the excluded observation?
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The mean of five number is 27.if one number is excluded their mean is ...
old mean = sum of the observations / total no. of observations

  27 = x/ 5

  x = 27 *5

  x = 135

new mean = sum of the observations / total no. of observations

  25 = y/ 4

  y= 25 *4

  y = 100

so the excluded number is

x - y =135-100 =35
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The mean of five number is 27.if one number is excluded their mean is ...

Explanation:

The mean of a set of numbers is calculated by adding up all the numbers in the set and then dividing by the total number of observations. In this case, we are given that the mean of five numbers is 27.

Step 1: Finding the sum of the five numbers
Let the five numbers be a, b, c, d, and e.
The sum of these five numbers is 5 * 27 = 135.

Step 2: Finding the sum of the four numbers (excluding one number)
Let's say the excluded number is x.
The sum of the remaining four numbers is 4 * 25 = 100.

Step 3: Finding the excluded number
Since the sum of the five numbers is 135 and the sum of the four numbers is 100, the excluded number can be calculated by subtracting the sum of the four numbers from the sum of the five numbers:
135 - 100 = 35.

Therefore, the excluded number is 35.
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The mean of five number is 27.if one number is excluded their mean is 25 find the excluded observation?
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