Given:
The average of four numbers = 12
The set of number includes 9, 11, 12 . Let the fourth number be \(x\).
Sum of four numbers \(= 12*4 = 48\)
\(9 + 11 + 12 + x = 48\)
\(x = 48 - 32\)
\(x = 16\)
The correct answer is C
The average of four numbers = 12
The set of number includes 9, 11, 12 . Let the fourth number be \(x\).
Sum of four numbers \(= 12*4 = 48\)
\(9 + 11 + 12 + x = 48\)
\(x = 48 - 32\)
\(x = 16\)
The correct answer is C