The average of five numbers 7, 11, 15, x, and 23 is 15. What is the value of x?
19
The average of the five numbers is 15, so their total sum is \(5 \times 15 = 75\).
Add the four known numbers: \(7 + 11 + 15 + 23 = 56\).
The unknown value is the total minus this sum: \(x = 75 - 56 = 19\).
Hence, the value of x is 19.
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