In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Choose the correct option:
Assertion (A) : If the arithmetic mean of \(x\), \(x + 3\), \(x + 6\), \(x + 9\) and \(x + 12\) is \(10\) then \(x = 14\).
Reason (R) : \(\text{Mean of raw data} = \frac{\text{Sum of obervations}}{\text{Number of observations}}\)