The mean of five numbers is 30. If one number is excluded, their mean becomes 28. The excluded number is
Question
The mean of five numbers is 30. If one number is excluded, their mean becomes 28. The excluded number is
Solution
Sure, here is the step by step solution:
Step 1: The mean of five numbers is 30. This means that the total sum of these five numbers is 30 * 5 = 150.
Step 2: If one number is excluded, the mean becomes 28. This means that the total sum of the remaining four numbers is 28 * 4 = 112.
Step 3: To find the excluded number, subtract the total sum of the remaining four numbers from the total sum of the original five numbers. So, 150 - 112 = 38.
Therefore, the excluded number is 38.
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