Given below is the frequency distribution of wages
(in Rs.) of 30 workers in a certain factory:
Wages (in Rs.) 110-130 130-150 150-170 170-190 190-210 210-230 230-250
No. of workers 3 4 5 6 5 4 3
A worker is selected at random. Find the
probability that his wages are:
(i)
less than Rs.
150
(ii)
at least Rs. 210
(iii)
more than or
equal to 150 but less than Rs. 210.
