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.

Explanation

To solve the problem, we will calculate the probability for each of the three parts step by step.

### Given Data:
- Wages (in Rs.):
- 110-130: 3 workers
- 130-150: 4 workers
- 150-170: 5 workers
- 170-190: 6 workers
...