Given that the average of x1, X2, X3 is. X, then the average of 3x1 + 5, 3x2 + 5, 3x3 + 5 is______ .
The average of ∵ x1, X2, X3 is. X, ∵ X1 + x2 + X3 = 3. X, ∵ 3x1 + 5, 3x2 + 5, 3x3 + 5 is 13 (3x1 + 5 + 3x2 + 5 + 3x3 + 5) = 13 [3 (x1 + x2 + x3) + 15] = 3. X + 5. So the answer is 3. X + 5
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