The age of
2929 students of a class is given below.
1818, 1919, 1515, 1414, 1818, 1717, 1818, 1414, 1515, 1919, 1515, 1515, 1818, 1515, 1919, 1717, 1414, 1818, 1717, 1919, 1515, 1818, 1717, 1818, 1515, 1818, 1717, 1818, 1717
Using empirical formula, find the modal age.