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what is the mean of all three-digit positive integers in the set {2, 0, 1, 9}

 Dec 14, 2018
 #1
avatar+4296 
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Count how many three digit numbers you can form, then add all of them up, and divide by how the number of numbers. 

 Dec 14, 2018
 #2
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Um...I don't see any three digit numbers in the set {2, 0, 1, 9}. I only see single-digit numbers.

 Dec 15, 2018
 #3
avatar+701 
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mean is the same thing as average. Add up all terms, and divide by the number of terms.

 

if there 3 terms of x, y, and z, the mean or average is \(\dfrac{x+y+z}{3}\).

PartialMathematician  Dec 15, 2018

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