Question
The mean of five numbers is 16. If four of the numbers are 13, 20, 11 and 21, what is the fifth number?
Step 1
The mean is calculated by summing all the numbers and dividing by the count of numbers. So, the sum of all five numbers can be calculated as the mean times the count of numbers. In this case, it is $16 \times 5 = 80$. Show more…
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