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A number is added to the following list:3,4,5,3,8,7,―If the mean is 5, what is the value of the missing number?

Question

A number is added to the following list:3,4,5,3,8,7,―If the mean is 5, what is the value of the missing number?

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Solution

To find the missing number, we first need to understand how the mean (average) is calculated. The mean is the sum of all numbers in a set divided by the count of numbers in the set.

Step 1: Add up the known numbers in the list: 3 + 4 + 5 + 3 + 8 + 7 = 30

Step 2: We know the mean is 5, and we know there are 7 numbers in the list (including the missing number). So, we multiply the mean by the count to find the total sum of all numbers: 5 * 7 = 35

Step 3: Subtract the sum of the known numbers from the total sum to find the missing number: 35 - 30 = 5

So, the missing number is 5.

This problem has been solved

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