The table gives the distribution of heights in metres of 100 students.

Height	1.40-1.42	1.43-1.45	1.46-1.48	1.49-1.51	1.52-1.54	1.55-1.57	1.58-1.60	1.61-1.63
Freq	2	4	19	30	24	14	6	1

(a) Calculate the : (i) mean height ; (ii) mean deviation of the distribution.

(b) What is the probability that the height of a student selected at random is greater than the mean height of the distribution?